unstable nixpkgs.php install error "error: this derivation has bad 'meta.outputsToInstall'"

[chrissound]

Describe the bug
A clear and concise description of what the bug is.

docker run -ti nixos/nix
$ nix-env -iA nixpkgs.php 

17e92f197561:/# nix --version
nix (Nix) 2.3.4
17e92f197561:/# nix-channel --list
nixpkgs https://nixos.org/channels/nixpkgs-unstable

17e92f197561:/# nix-env -iA nixpkgs.php 
installing 'php-with-extensions-7.4.4'
these derivations will be built:
  /nix/store/j6p6rskjji6l4hw95wbyyj2iyxd9j1j5-php.ini.drv
  /nix/store/kymjwis1v82wif5jn7pczphg4j5q3ir5-php-with-extensions-7.4.4.drv
these paths will be fetched (45.74 MiB download, 203.69 MiB unpacked):
  /nix/store/0cxqyn95rh7vihmywnaimrxlpb58958i-php-gd-7.4.4
  /nix/store/0pxqh18n0wzqa6aamad2ljrl5nahlyiv-php-openssl-7.4.4
  /nix/store/0s93dpvxn7vaaah3n1lgz0q0xqdfsbkj-gnutar-1.32
  /nix/store/0ycxg6wshwv55w5kv55xavijbh4ac68j-linux-pam-1.3.1
  /nix/store/1fbinxrw5fhkixr5pi7d4pqx8hfjf5gy-php-mysqli-7.4.4
  /nix/store/264m65kjp3f9dbzjg457g21d3klpynvn-php-sockets-7.4.4
  /nix/store/2bl4ig3bhg7xpilgs47x5rmb5wmycbsb-gd-2.3.0
  /nix/store/2c0jqmch573719vvgzgayc4haqpi260r-libedit-20191231-3.1
  /nix/store/2ias3wbvf9f56nh0b2wc874jqdla7x13-php-exif-7.4.4
  /nix/store/2xrh10ifdiwfwfwdw7c52vwshrn3fvs3-php-pdo_odbc-7.4.4
  /nix/store/2yr6mf5i6mrkwbinyadgnp2q33xs67zd-cyrus-sasl-2.1.27
  /nix/store/3hkj53lkmaz332zv7kcap0rlr5g6vich-gmp-6.2.0
  /nix/store/3r7qrp8f4zl1p5xxvznvkpyl4m0sdrg1-unixODBC-2.3.7
  /nix/store/42yahg06331ikx2yn7xcjzwlshvpsma4-php-fileinfo-7.4.4
  /nix/store/493cvv44fzj74r7xjb3briaxiy5lyxs5-php-dom-7.4.4
  /nix/store/4caxg57ckkxmwciimzy3jdviha09mr8f-php-json-7.4.4
  /nix/store/4xxgwdxg03bf72njqnacslq7b2azz30f-hook
  /nix/store/56ylrnhxlhbz2rnh8yhpybnhv11ii4a8-db-4.8.30
  /nix/store/5910w90lwx8w3rkl3mvkx9j62g7h5cy4-libgpg-error-1.36
  /nix/store/5drpzq5gnbxrqjq8i011mab80n7b5r37-hook
  /nix/store/5rc4z46kxm5lf5i5zczanbq8bmgprh3z-pcre-8.44
  /nix/store/65asl612f2csb2ka57xj70ikw7qqsijc-php-sqlite3-7.4.4
  /nix/store/689z1nccb3bqxbybr0snr1pgc64ihxya-cracklib-2.9.7
  /nix/store/6ca524vb3yg59ag3khm0010591rny9v1-xz-5.2.5-bin
  /nix/store/6g4zfh6hgxhhr1f1d984wf018d5z92pd-libxml2-2.9.10
  /nix/store/6w00bxi00xmz3zvgn9y08ln3k6803k9y-libpng-apng-1.6.37
  /nix/store/6yqb5dfmlsx0zr0q8xzi8v4wbrzmvwpf-gzip-1.10
  /nix/store/719y6dzd78pqyn7bvawhc67v7yb7c2zj-php-mbstring-7.4.4
  /nix/store/73g2x18g8jd59pq5i1i4m5fynb479ikz-lndir-1.0.3
  /nix/store/8bqfam4bl8098q76rwrd69izv503vwb9-php-mysqlnd-7.4.4
  /nix/store/8dsisa9319gfxqngcl8r5bpnw878bpg2-stdenv-linux
  /nix/store/8p804y3l03gfdjdlsc90v6xmjzwv65fw-attr-2.4.48
  /nix/store/8pajzfyqx1v7dz1znrnrc4pqj5rmnx24-gnugrep-3.4
  /nix/store/92p2nhsj5r290fslcayad6qrqgij2nhg-php-simplexml-7.4.4
  /nix/store/94vksykx1134lvjk8vd19hkdks3g6wfh-systemd-245.3-lib
  /nix/store/96wbk4pqc0lclmjcb30blzv7dd98lc33-icu4c-64.2
  /nix/store/998ykzc5mazwak08hxayqmyqkyz18fcb-gnumake-4.2.1
  /nix/store/9l6d9k9f0i9pnkfjkvsm7xicpzn4cv2c-libidn2-2.3.0
  /nix/store/a3wpkq038xa5q54ipp51hfvn54gnvb93-php-pdo_sqlite-7.4.4
  /nix/store/acr8kar73ms8x8cd0vvkhmv9x03hjqkm-libjpeg-turbo-2.0.4
  /nix/store/axg1h1qjmm32l2kzv29ypm11dm8s663n-expat-2.2.8
  /nix/store/baidx7w7b6mhp8dwraad3c6ld85a6b05-php-iconv-7.4.4
  /nix/store/bwzra330vib0ik4d3l8rq6gp6y2ah1fr-glibc-2.30
  /nix/store/c8nzpy2f2sz0w3mp4x8gkpn4hd4l2420-patch-2.7.6
  /nix/store/ca9mkrf8sa8md8pv61jslhcnfk9mmg4p-coreutils-8.31
  /nix/store/cnaa9cz9rbpim2068f2a3bkra1c4ikfa-libossp-uuid-1.6.2
  /nix/store/d9ll1w9ra8ws7bvvi28z9g6rp43mr26k-lz4-1.9.2
  /nix/store/dy8yvxdl9plhl32d0nlyhmqmw0all36r-fontconfig-2.12.6-lib
  /nix/store/dzsza6g51ilsk3y6ixh6nfcb7agr5hwq-postgresql-11.7-lib
  /nix/store/f25w74v4kznswv7y3v9clddxbfvdf6ks-php-sodium-7.4.4
  /nix/store/fiv2q6p3pafbwc9mpgnibychgsy3bacp-keyutils-1.6.1-lib
  /nix/store/flxf7m15xwkkr9lqwb8xqnznrw2gs8z1-php-pdo-7.4.4
  /nix/store/fn92v9h7gxj9w4z0s2qxsjxb4awczl3h-ncurses-6.2
  /nix/store/fnrpwiir26q1gjpv640k98s648v8k1s7-php-readline-7.4.4
  /nix/store/g54zrrpg4wiykyxqy3i793jwbx8939py-php-gmp-7.4.4
  /nix/store/g6li7h6057dxa4s9acgp9zs7n8pllbns-php-pgsql-7.4.4
  /nix/store/gjcqrb4if1ph0w6mjp50gxwmnyc6j684-libgcrypt-1.8.5
  /nix/store/gx7nnla5s036a0bk6pw53wybqdwvlxlw-libcap-2.27-lib
  /nix/store/h7n36p7317b6fm3pf79q3kg87a4p98p8-db-5.3.28
  /nix/store/hg3albf7g05ljfqrfjhd58rblimrp6ph-findutils-4.7.0
  /nix/store/hgp00a1rgwqxjcrkqhbjrfb5df7wjhl5-bzip2-1.0.6.0.1-bin
  /nix/store/hk87010wz87bqvg5az5vzpsxhq9bl9ky-zlib-1.2.11
  /nix/store/i9q02g2f05x41s9yxcn1y4awqhwny6c1-openssl-1.1.1g
  /nix/store/igqjvxp4cvsxl73h6kpzlas5v6yf0kb0-php-calendar-7.4.4
  /nix/store/is24cfjpdxfn1a9g10hralmg7dsp0lq3-bzip2-1.0.6.0.1
  /nix/store/ix1y26dz3z4mnv5r8jkb3bc802j1hwj9-php-soap-7.4.4
  /nix/store/ixwxhwyhva7qqmj2fyk1p9k5avmkhr5a-php-bcmath-7.4.4
  /nix/store/jhycyk5jlw8dsyhnpci9w841yxkv0k9z-php-pdo_mysql-7.4.4
  /nix/store/jjgrv4iva5wgg5hby1fgy8zn9brjg6dy-onig-6.9.4
  /nix/store/jkb5zcxnxyb2hjl6drzdfgl2vafgkk22-libssh2-1.9.0
  /nix/store/jkdsm107dl8zzacwfq869ryhga8pf2ni-freetype-2.10.1
  /nix/store/jl81sd7jwf7jnxmy8g3hxlwaic0sbl6a-php-session-7.4.4
  /nix/store/jpqlmf3wqg281j8fdz50kjl525pfsxjc-gnused-4.8
  /nix/store/k7rakfl1ld9ycfm1zzszly0161h6jlcp-diffutils-3.7
  /nix/store/kgp3vq8l9yb8mzghbw83kyr3f26yqvsz-bash-4.4-p23
  /nix/store/kja91sjnhvqyjvhvabw2wifk30jxsd3n-libsodium-1.0.18
  /nix/store/kk9lb46x02xjvx09zw5brjr81qwq8s5p-php-intl-7.4.4
  /nix/store/ky6symjpw49mjqq26l1hbzg6abd5y4lp-php-ctype-7.4.4
  /nix/store/l0dgzfcjbszxz9sa7dr8h9r0rxa1r2l1-php-zip-7.4.4
  /nix/store/l2nr8x24l0q9d3f1r5l66jw7mm0xyflw-ed-1.16
  /nix/store/l9482jchwgyswpyd71d0qvjfhyf64h71-giflib-5.2.1
  /nix/store/ll1ycxw7b63s7n5343s7c2f7rxr91i5f-libzip-1.6.1
  /nix/store/mdph3wqzx7akbbrwvx32na7pcfajn605-php-tokenizer-7.4.4
  /nix/store/miwvn81sgbbcq5bfglr6v3pwchgsd00c-gawk-5.0.1
  /nix/store/n0nh8bhvsw5cpbxgj0brari243vxsy1c-php-gettext-7.4.4
  /nix/store/n587ax9k9rc5cxm66aiibsss60pqk6b4-gcc-9.3.0-lib
  /nix/store/na7s0jkh40k73djyb9aaj71f9b01klny-php-posix-7.4.4
  /nix/store/ndzq6cgpgrs7fmaiczj1mm6g8rj47bgs-php-ldap-7.4.4
  /nix/store/par9jm5nfczlqsfznr3ikacvd7r31gqz-php-ftp-7.4.4
  /nix/store/pgj5vsdly7n4rc8jax3x3sill06l44qp-libunistring-0.9.10
  /nix/store/psy4pnlfl5l8jjhlz058kx075pplz59x-fontconfig-2.12.6
  /nix/store/q231x0xln1dqyk8b815gak5cdbk6yj08-libtool-2.4.6-lib
  /nix/store/r2binrxqfqwhssxn2mc3v883qz4g4bs0-php-curl-7.4.4
  /nix/store/r6bpxwqcgc4z5bc57b7pjdgbrzpaqpb1-libtiff-4.1.0
  /nix/store/r6pi9hr67hibqs3pji8c2p2p0hlj2sik-dejavu-fonts-minimal-2.37
  /nix/store/s02ymiyiw7db32c0kxap3bfbz2zyxxlh-libargon2-20190702
  /nix/store/s1fa3s9ynpn2l19bzd811qlifv5rxs75-acl-2.2.53
  /nix/store/s2kzvmvgsfzfb7inslh47h4hxnhah5v9-php-filter-7.4.4
  /nix/store/s6iyqby400szhsb1cwqawrvc0yv4vr3g-openldap-2.4.50
  /nix/store/sicn6b10ixbs6435d7dr630i2hxphfpr-patchelf-0.9
  /nix/store/vlvd5yd4xy23d1dxza90v0p3bmz9bc26-php-pdo_pgsql-7.4.4
  /nix/store/vpikbk2lnchdw69yxfiihs3gvxzb55x0-php-xmlwriter-7.4.4
  /nix/store/w14gvb104fsxqn20aqx7bigvwygfkd39-pcre2-10.34
  /nix/store/w3ag8l2cqqh8d7klqsg4ipgjlzawmms3-sqlite-3.31.1
  /nix/store/wbz10lynifyawfqadfqgz8wvncx3z5fm-nghttp2-1.40.0-lib
  /nix/store/wfvs89yfxzdjy6jma3b1jnjb53hpn871-php-opcache-7.4.4
  /nix/store/wx3xk3sk6gxr5sgkd1kbg0g6fgjh0fv0-xz-5.2.5
  /nix/store/x5pw578gwgvvamygh5g9gp3bpnc72lb7-libkrb5-1.18
  /nix/store/x8wv6wk8q0vnp4di7rlmf59azm4394nv-php-imap-7.4.4
  /nix/store/xxvimzkzxjxkiwkz6cpzlz3p6z1pk8db-php-pcntl-7.4.4
  /nix/store/y5x09y1z96w3dqlc8q615qj5a0357jij-php-zlib-7.4.4
  /nix/store/y82gpj07gypnw99i47dpbr9qrm1zjykw-curl-7.69.1
  /nix/store/yr4jr023kckapchfc9v5fdn9swygq758-libwebp-1.0.3
  /nix/store/yw37slb731pasrk72q8ikd0y8llg74s3-php-7.4.4
  /nix/store/z73v2sy4xmm5mgxjkss8y8zs21qdrj0q-php-xmlreader-7.4.4
copying path '/nix/store/4xxgwdxg03bf72njqnacslq7b2azz30f-hook' from 'https://cache.nixos.org'...
copying path '/nix/store/r6pi9hr67hibqs3pji8c2p2p0hlj2sik-dejavu-fonts-minimal-2.37' from 'https://cache.nixos.org'...
copying path '/nix/store/pgj5vsdly7n4rc8jax3x3sill06l44qp-libunistring-0.9.10' from 'https://cache.nixos.org'...
copying path '/nix/store/psy4pnlfl5l8jjhlz058kx075pplz59x-fontconfig-2.12.6' from 'https://cache.nixos.org'...
copying path '/nix/store/9l6d9k9f0i9pnkfjkvsm7xicpzn4cv2c-libidn2-2.3.0' from 'https://cache.nixos.org'...
copying path '/nix/store/bwzra330vib0ik4d3l8rq6gp6y2ah1fr-glibc-2.30' from 'https://cache.nixos.org'...
copying path '/nix/store/8p804y3l03gfdjdlsc90v6xmjzwv65fw-attr-2.4.48' from 'https://cache.nixos.org'...
copying path '/nix/store/kgp3vq8l9yb8mzghbw83kyr3f26yqvsz-bash-4.4-p23' from 'https://cache.nixos.org'...
copying path '/nix/store/s1fa3s9ynpn2l19bzd811qlifv5rxs75-acl-2.2.53' from 'https://cache.nixos.org'...
copying path '/nix/store/is24cfjpdxfn1a9g10hralmg7dsp0lq3-bzip2-1.0.6.0.1' from 'https://cache.nixos.org'...
copying path '/nix/store/ca9mkrf8sa8md8pv61jslhcnfk9mmg4p-coreutils-8.31' from 'https://cache.nixos.org'...
copying path '/nix/store/hgp00a1rgwqxjcrkqhbjrfb5df7wjhl5-bzip2-1.0.6.0.1-bin' from 'https://cache.nixos.org'...
^[[Acopying path '/nix/store/k7rakfl1ld9ycfm1zzszly0161h6jlcp-diffutils-3.7' from 'https://cache.nixos.org'...
copying path '/nix/store/l2nr8x24l0q9d3f1r5l66jw7mm0xyflw-ed-1.16' from 'https://cache.nixos.org'...
copying path '/nix/store/axg1h1qjmm32l2kzv29ypm11dm8s663n-expat-2.2.8' from 'https://cache.nixos.org'...
copying path '/nix/store/hg3albf7g05ljfqrfjhd58rblimrp6ph-findutils-4.7.0' from 'https://cache.nixos.org'...
copying path '/nix/store/miwvn81sgbbcq5bfglr6v3pwchgsd00c-gawk-5.0.1' from 'https://cache.nixos.org'...
copying path '/nix/store/n587ax9k9rc5cxm66aiibsss60pqk6b4-gcc-9.3.0-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/l9482jchwgyswpyd71d0qvjfhyf64h71-giflib-5.2.1' from 'https://cache.nixos.org'...
copying path '/nix/store/56ylrnhxlhbz2rnh8yhpybnhv11ii4a8-db-4.8.30' from 'https://cache.nixos.org'...
copying path '/nix/store/h7n36p7317b6fm3pf79q3kg87a4p98p8-db-5.3.28' from 'https://cache.nixos.org'...
copying path '/nix/store/3hkj53lkmaz332zv7kcap0rlr5g6vich-gmp-6.2.0' from 'https://cache.nixos.org'...
copying path '/nix/store/998ykzc5mazwak08hxayqmyqkyz18fcb-gnumake-4.2.1' from 'https://cache.nixos.org'...
copying path '/nix/store/jpqlmf3wqg281j8fdz50kjl525pfsxjc-gnused-4.8' from 'https://cache.nixos.org'...
copying path '/nix/store/0s93dpvxn7vaaah3n1lgz0q0xqdfsbkj-gnutar-1.32' from 'https://cache.nixos.org'...
copying path '/nix/store/6yqb5dfmlsx0zr0q8xzi8v4wbrzmvwpf-gzip-1.10' from 'https://cache.nixos.org'...
copying path '/nix/store/5drpzq5gnbxrqjq8i011mab80n7b5r37-hook' from 'https://cache.nixos.org'...
copying path '/nix/store/96wbk4pqc0lclmjcb30blzv7dd98lc33-icu4c-64.2' from 'https://cache.nixos.org'...
copying path '/nix/store/fiv2q6p3pafbwc9mpgnibychgsy3bacp-keyutils-1.6.1-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/s02ymiyiw7db32c0kxap3bfbz2zyxxlh-libargon2-20190702' from 'https://cache.nixos.org'...
copying path '/nix/store/gx7nnla5s036a0bk6pw53wybqdwvlxlw-libcap-2.27-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/5910w90lwx8w3rkl3mvkx9j62g7h5cy4-libgpg-error-1.36' from 'https://cache.nixos.org'...
copying path '/nix/store/acr8kar73ms8x8cd0vvkhmv9x03hjqkm-libjpeg-turbo-2.0.4' from 'https://cache.nixos.org'...
copying path '/nix/store/gjcqrb4if1ph0w6mjp50gxwmnyc6j684-libgcrypt-1.8.5' from 'https://cache.nixos.org'...
copying path '/nix/store/x5pw578gwgvvamygh5g9gp3bpnc72lb7-libkrb5-1.18' from 'https://cache.nixos.org'...
copying path '/nix/store/cnaa9cz9rbpim2068f2a3bkra1c4ikfa-libossp-uuid-1.6.2' from 'https://cache.nixos.org'...
copying path '/nix/store/kja91sjnhvqyjvhvabw2wifk30jxsd3n-libsodium-1.0.18' from 'https://cache.nixos.org'...
copying path '/nix/store/q231x0xln1dqyk8b815gak5cdbk6yj08-libtool-2.4.6-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/73g2x18g8jd59pq5i1i4m5fynb479ikz-lndir-1.0.3' from 'https://cache.nixos.org'...
copying path '/nix/store/d9ll1w9ra8ws7bvvi28z9g6rp43mr26k-lz4-1.9.2' from 'https://cache.nixos.org'...
copying path '/nix/store/fn92v9h7gxj9w4z0s2qxsjxb4awczl3h-ncurses-6.2' from 'https://cache.nixos.org'...
copying path '/nix/store/wbz10lynifyawfqadfqgz8wvncx3z5fm-nghttp2-1.40.0-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/2c0jqmch573719vvgzgayc4haqpi260r-libedit-20191231-3.1' from 'https://cache.nixos.org'...
copying path '/nix/store/jjgrv4iva5wgg5hby1fgy8zn9brjg6dy-onig-6.9.4' from 'https://cache.nixos.org'...
copying path '/nix/store/i9q02g2f05x41s9yxcn1y4awqhwny6c1-openssl-1.1.1g' from 'https://cache.nixos.org'...
copying path '/nix/store/c8nzpy2f2sz0w3mp4x8gkpn4hd4l2420-patch-2.7.6' from 'https://cache.nixos.org'...
copying path '/nix/store/2yr6mf5i6mrkwbinyadgnp2q33xs67zd-cyrus-sasl-2.1.27' from 'https://cache.nixos.org'...
copying path '/nix/store/sicn6b10ixbs6435d7dr630i2hxphfpr-patchelf-0.9' from 'https://cache.nixos.org'...
copying path '/nix/store/s6iyqby400szhsb1cwqawrvc0yv4vr3g-openldap-2.4.50' from 'https://cache.nixos.org'...
copying path '/nix/store/5rc4z46kxm5lf5i5zczanbq8bmgprh3z-pcre-8.44' from 'https://cache.nixos.org'...
copying path '/nix/store/w14gvb104fsxqn20aqx7bigvwygfkd39-pcre2-10.34' from 'https://cache.nixos.org'...
copying path '/nix/store/8pajzfyqx1v7dz1znrnrc4pqj5rmnx24-gnugrep-3.4' from 'https://cache.nixos.org'...
copying path '/nix/store/ixwxhwyhva7qqmj2fyk1p9k5avmkhr5a-php-bcmath-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/igqjvxp4cvsxl73h6kpzlas5v6yf0kb0-php-calendar-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/ky6symjpw49mjqq26l1hbzg6abd5y4lp-php-ctype-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/2ias3wbvf9f56nh0b2wc874jqdla7x13-php-exif-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/42yahg06331ikx2yn7xcjzwlshvpsma4-php-fileinfo-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/s2kzvmvgsfzfb7inslh47h4hxnhah5v9-php-filter-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/par9jm5nfczlqsfznr3ikacvd7r31gqz-php-ftp-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/n0nh8bhvsw5cpbxgj0brari243vxsy1c-php-gettext-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/g54zrrpg4wiykyxqy3i793jwbx8939py-php-gmp-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/baidx7w7b6mhp8dwraad3c6ld85a6b05-php-iconv-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/kk9lb46x02xjvx09zw5brjr81qwq8s5p-php-intl-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/4caxg57ckkxmwciimzy3jdviha09mr8f-php-json-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/ndzq6cgpgrs7fmaiczj1mm6g8rj47bgs-php-ldap-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/719y6dzd78pqyn7bvawhc67v7yb7c2zj-php-mbstring-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/1fbinxrw5fhkixr5pi7d4pqx8hfjf5gy-php-mysqli-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/wfvs89yfxzdjy6jma3b1jnjb53hpn871-php-opcache-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/0pxqh18n0wzqa6aamad2ljrl5nahlyiv-php-openssl-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/xxvimzkzxjxkiwkz6cpzlz3p6z1pk8db-php-pcntl-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/flxf7m15xwkkr9lqwb8xqnznrw2gs8z1-php-pdo-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/jhycyk5jlw8dsyhnpci9w841yxkv0k9z-php-pdo_mysql-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/na7s0jkh40k73djyb9aaj71f9b01klny-php-posix-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/fnrpwiir26q1gjpv640k98s648v8k1s7-php-readline-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/jl81sd7jwf7jnxmy8g3hxlwaic0sbl6a-php-session-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/264m65kjp3f9dbzjg457g21d3klpynvn-php-sockets-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/f25w74v4kznswv7y3v9clddxbfvdf6ks-php-sodium-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/mdph3wqzx7akbbrwvx32na7pcfajn605-php-tokenizer-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/3r7qrp8f4zl1p5xxvznvkpyl4m0sdrg1-unixODBC-2.3.7' from 'https://cache.nixos.org'...
copying path '/nix/store/wx3xk3sk6gxr5sgkd1kbg0g6fgjh0fv0-xz-5.2.5' from 'https://cache.nixos.org'...
copying path '/nix/store/2xrh10ifdiwfwfwdw7c52vwshrn3fvs3-php-pdo_odbc-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/94vksykx1134lvjk8vd19hkdks3g6wfh-systemd-245.3-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/6ca524vb3yg59ag3khm0010591rny9v1-xz-5.2.5-bin' from 'https://cache.nixos.org'...
copying path '/nix/store/hk87010wz87bqvg5az5vzpsxhq9bl9ky-zlib-1.2.11' from 'https://cache.nixos.org'...
copying path '/nix/store/8dsisa9319gfxqngcl8r5bpnw878bpg2-stdenv-linux' from 'https://cache.nixos.org'...
copying path '/nix/store/689z1nccb3bqxbybr0snr1pgc64ihxya-cracklib-2.9.7' from 'https://cache.nixos.org'...
copying path '/nix/store/6w00bxi00xmz3zvgn9y08ln3k6803k9y-libpng-apng-1.6.37' from 'https://cache.nixos.org'...
copying path '/nix/store/jkb5zcxnxyb2hjl6drzdfgl2vafgkk22-libssh2-1.9.0' from 'https://cache.nixos.org'...
copying path '/nix/store/jkdsm107dl8zzacwfq869ryhga8pf2ni-freetype-2.10.1' from 'https://cache.nixos.org'...
copying path '/nix/store/y82gpj07gypnw99i47dpbr9qrm1zjykw-curl-7.69.1' from 'https://cache.nixos.org'...
copying path '/nix/store/dy8yvxdl9plhl32d0nlyhmqmw0all36r-fontconfig-2.12.6-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/r6bpxwqcgc4z5bc57b7pjdgbrzpaqpb1-libtiff-4.1.0' from 'https://cache.nixos.org'...
copying path '/nix/store/6g4zfh6hgxhhr1f1d984wf018d5z92pd-libxml2-2.9.10' from 'https://cache.nixos.org'...
copying path '/nix/store/yr4jr023kckapchfc9v5fdn9swygq758-libwebp-1.0.3' from 'https://cache.nixos.org'...
copying path '/nix/store/ll1ycxw7b63s7n5343s7c2f7rxr91i5f-libzip-1.6.1' from 'https://cache.nixos.org'...
copying path '/nix/store/2bl4ig3bhg7xpilgs47x5rmb5wmycbsb-gd-2.3.0' from 'https://cache.nixos.org'...
copying path '/nix/store/0ycxg6wshwv55w5kv55xavijbh4ac68j-linux-pam-1.3.1' from 'https://cache.nixos.org'...
copying path '/nix/store/yw37slb731pasrk72q8ikd0y8llg74s3-php-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/r2binrxqfqwhssxn2mc3v883qz4g4bs0-php-curl-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/493cvv44fzj74r7xjb3briaxiy5lyxs5-php-dom-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/0cxqyn95rh7vihmywnaimrxlpb58958i-php-gd-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/x8wv6wk8q0vnp4di7rlmf59azm4394nv-php-imap-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/8bqfam4bl8098q76rwrd69izv503vwb9-php-mysqlnd-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/92p2nhsj5r290fslcayad6qrqgij2nhg-php-simplexml-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/ix1y26dz3z4mnv5r8jkb3bc802j1hwj9-php-soap-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/z73v2sy4xmm5mgxjkss8y8zs21qdrj0q-php-xmlreader-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/vpikbk2lnchdw69yxfiihs3gvxzb55x0-php-xmlwriter-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/l0dgzfcjbszxz9sa7dr8h9r0rxa1r2l1-php-zip-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/y5x09y1z96w3dqlc8q615qj5a0357jij-php-zlib-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/dzsza6g51ilsk3y6ixh6nfcb7agr5hwq-postgresql-11.7-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/w3ag8l2cqqh8d7klqsg4ipgjlzawmms3-sqlite-3.31.1' from 'https://cache.nixos.org'...
copying path '/nix/store/vlvd5yd4xy23d1dxza90v0p3bmz9bc26-php-pdo_pgsql-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/a3wpkq038xa5q54ipp51hfvn54gnvb93-php-pdo_sqlite-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/g6li7h6057dxa4s9acgp9zs7n8pllbns-php-pgsql-7.4.4' from 'https://cache.nixos.org'...
copying path '/nix/store/65asl612f2csb2ka57xj70ikw7qqsijc-php-sqlite3-7.4.4' from 'https://cache.nixos.org'...
building '/nix/store/j6p6rskjji6l4hw95wbyyj2iyxd9j1j5-php.ini.drv'...
building '/nix/store/kymjwis1v82wif5jn7pczphg4j5q3ir5-php-with-extensions-7.4.4.drv'...
error: this derivation has bad 'meta.outputsToInstall'

[veprbl]

cc @NixOS/php

[chrissound]

Just tried this on my Nixos machine with the latest unstable, which is also failing with another error:

nix-env -iA unstable.php 
installing 'php-with-extensions-7.4.6'
these derivations will be built:
  /nix/store/2mx6w89xmpasjprysf3qqdw1d73k15vk-php.ini.drv
  /nix/store/0smqcqpx4r3gz3b0pi0dbbs0hs9fdkk6-php-with-extensions-7.4.6.drv
these paths will be fetched (45.74 MiB download, 203.59 MiB unpacked):
  /nix/store/02wjmrmh5r2w1qbny1q15s0d3bnvjz0g-php-posix-7.4.6
  /nix/store/0im1v7xmmbvs20l0j7qzy90nlhzpcfnl-unixODBC-2.3.7
  /nix/store/0m3sja529iqsyk07ng0w5agrfkdi8nci-acl-2.2.53
  /nix/store/10hjg81wn345djw2l4ig8fgy59ndmrw9-php-soap-7.4.6
  /nix/store/10ik7zb8h733diqf9i74s28hraaf5k63-php-readline-7.4.6
  /nix/store/11l898wc2q132fhk2ai875rz6qjh4mfp-fontconfig-2.12.6
  /nix/store/13xz1n66rpb95knvvfn0gkzy9id6b8l5-php-openssl-7.4.6
  /nix/store/19hgni25hb2379ksk82ibk7v2nxv6ivm-libgpg-error-1.36
  /nix/store/1d7f7h7l5nwwc3381knhp5w1xsi9xigi-php-json-7.4.6
  /nix/store/244yvw8fnxdv6zfkq2c6jqmw35jg6ib7-gcc-9.3.0-lib
  /nix/store/25p58pc4cb5gxqx0kd3p9blkc29cfa1s-bzip2-1.0.6.0.1-bin
  /nix/store/2765gcl7nip27s125fsrpiiwd4d60vzr-expat-2.2.8
  /nix/store/2b1pws4l1w26qy2b2hpiqw3z6ynlaqrx-php-mbstring-7.4.6
  /nix/store/2vjzwmx33rhyc5nswqlgdksfhnqz2a2a-php-session-7.4.6
  /nix/store/37smvzh9m5b0rrl5iz0d1kfhmsq7mqmy-php-xmlreader-7.4.6
  /nix/store/38kikfbry3674n6ihin9f3jklgksh5mi-giflib-5.2.1
  /nix/store/3fhi862ac934c08z0xws5ypfbljfvgbf-lz4-1.9.2
  /nix/store/3qgzqqamhnwm178amyb46pdrzx2nakl5-coreutils-8.31
  /nix/store/3wwi17hszkg9jr12q2cy3d8q7vfqvp3i-nghttp2-1.40.0-lib
  /nix/store/3zvslnwhgryvpz641x16jayljd5br2c1-php-gettext-7.4.6
  /nix/store/42q2czd5igvq2i54cvgkzz71081nnyyd-php-sodium-7.4.6
  /nix/store/44504dmip6m8yzbnbha4hjgxfqwvf653-openldap-2.4.50
  /nix/store/58vavyggrv0s48l5fshif4c8vswlhp5x-patchelf-0.9
  /nix/store/5vd37kgp8vla92k3g1w9ka3fwkqqd3sp-db-5.3.28
  /nix/store/6c8qwlya5kqqa16hnjjfn1kg7qm7wrp9-hook
  /nix/store/6n32lszy7ks2wb532w4p3xvn66lnjxqw-php-imap-7.4.6
  /nix/store/7azmbw8nz93ff4k3b4qmbi32p0zp2gdd-php-sockets-7.4.6
  /nix/store/7i9rqnwh3m53z5a4md9sdgk1fdgk7cw4-bzip2-1.0.6.0.1
  /nix/store/81wybawvkr95c7j8gj5ab3y740mq1fli-bash-4.4-p23
  /nix/store/89v868vjf7ywafvaj47024nf3wba9kny-php-pdo_pgsql-7.4.6
  /nix/store/8a07wrvzqi7ak4b956nfclx0h3nfwl3b-pcre-8.44
  /nix/store/8bv2fcwc0xa2qx991yx40jczi4g0214b-php-opcache-7.4.6
  /nix/store/8d1cfzfsnsh9sjrj11lvwfq8w9kd748p-libedit-20191231-3.1
  /nix/store/8kk107mbrs5xjil56hfzh3wwqqdmsvid-gawk-5.1.0
  /nix/store/8l6knfgrr33vagcw9y40dwlsihwvpq3q-libssh2-1.9.0
  /nix/store/932zigmrsz9lmds70l4ajbaci4wa073b-gnused-4.8
  /nix/store/97rhik3rqd56a5r856a3b156rzdzrh12-php-simplexml-7.4.6
  /nix/store/9kpnm6wdaqzm26kbvcpk1an079rjy7qh-ed-1.16
  /nix/store/9l6d9k9f0i9pnkfjkvsm7xicpzn4cv2c-libidn2-2.3.0
  /nix/store/9nknbj0mnv56wf42hb8i1aah0w8mb2ca-php-sqlite3-7.4.6
  /nix/store/9raydnks1f4wzny1k84z52y4aam0py6w-php-dom-7.4.6
  /nix/store/9w8ivkd7kpfanfp82zx6drky3infv0dv-php-xmlwriter-7.4.6
  /nix/store/a1zak2h51s5f2b8cfir98q4kgbrdr9ik-gnumake-4.2.1
  /nix/store/a6sbfdmqnw16i0giiv2dnwfg83gznnfj-zlib-1.2.11
  /nix/store/b5jplc769pcsxy3ay1b75cwk6ca8r594-xz-5.2.5-bin
  /nix/store/b9yc1faqr159pwbrg9kabhl4zkpnk2v5-openssl-1.1.1g
  /nix/store/bbylg4yz3cfc2v5aqzaf4x9dk9y5s2ci-php-bcmath-7.4.6
  /nix/store/bv109wps3957kgwi0i84jy66k0zl5bca-php-ctype-7.4.6
  /nix/store/bw561416fw1md9px25ixhwg4d955kh7m-libargon2-20190702
  /nix/store/cb6kgg6r94nwwwnc3xqadknl8cc5dxmb-gmp-6.2.0
  /nix/store/cdf32k913rjyd4bjswnwyk37cz638pw5-php-pdo_mysql-7.4.6
  /nix/store/d4hjldzdfg2msya68ym50fvbq6a0a6k0-diffutils-3.7
  /nix/store/d9lgc4z622qqyczycca641w68bz4rcwx-php-ftp-7.4.6
  /nix/store/dcwdvxfma1gxbdpv9blh97hxanh722z6-php-exif-7.4.6
  /nix/store/f0bj15hsyxp8zql86i75wi483zgldzy0-curl-7.69.1
  /nix/store/f0v2q4l68d304dszsm3njhsmjxq18h9r-php-zlib-7.4.6
  /nix/store/f2l7l00zabsih8dm9df3af6k41nnqsyw-libgcrypt-1.8.5
  /nix/store/f65bsq61vkpzdw5nv1b2b87l5gh4ji12-libossp-uuid-1.6.2
  /nix/store/fhhyq76n7b4r7q7fs5yahh9ryj4ps3y8-php-gd-7.4.6
  /nix/store/fjim66v7ddsv2rbz8sflj0gi8ybc2486-cracklib-2.9.7
  /nix/store/fs9h12v2q05fk5vqdw84pz7p21rfb050-php-pdo_odbc-7.4.6
  /nix/store/g3qrpg0miwpsd7vjdingzpqkg16w8hqs-stdenv-linux
  /nix/store/ggxka4dd4swfh7xj63gpipvayzz0h34n-php-iconv-7.4.6
  /nix/store/gv5yhri5rp7sqdxa78aqc59ivyza059q-xz-5.2.5
  /nix/store/gxddlgixdc3wvp82hw05fvw9r2bds5q0-libxml2-2.9.10
  /nix/store/hd2bn6gccjdwl1diikqvjjgvkz94rgk7-findutils-4.7.0
  /nix/store/hi5655s7r4p82blynf5s0xzavjw36mgn-gnugrep-3.4
  /nix/store/hp3a4ryjx39f7l59dslbbzpjawvqhqs4-php-mysqlnd-7.4.6
  /nix/store/i4cbsr80bpk7ad43gzxkgwbcay4yhsv7-php-zip-7.4.6
  /nix/store/ihv6ws6wwpribvfvyzg9swhp84y1qnih-patch-2.7.6
  /nix/store/j3005jdd48vhhm1n8jvznix7fayx01np-ncurses-6.2
  /nix/store/jjbrhv20gq9bddq7ci2j3y2lywbxhz5h-php-mysqli-7.4.6
  /nix/store/k4lyqnhks8lihpvzklayh6b37r5krgpq-sqlite-3.31.1
  /nix/store/k5g3bdlnwg1mzid6080zgv096rxgbbkq-fontconfig-2.12.6-lib
  /nix/store/kvdl1dd9q9mdwp2gipyvwrs16i4w75lq-gnutar-1.32
  /nix/store/kyjax9kfrg3gmq3rnrc1a39g5wh6ffzg-php-ldap-7.4.6
  /nix/store/lj1007wk22rhqfbwgx2yrglbk8hbkzmc-php-tokenizer-7.4.6
  /nix/store/lpgpdbkwpk9gh84cfi3vfv4qj10hjm77-php-intl-7.4.6
  /nix/store/lq4lky36aw1rdgiffljg7mx8f4l8q28w-freetype-2.10.1
  /nix/store/mi6i4ifqzj4afyzp12lhbgzbqqw9x9sa-libkrb5-1.18
  /nix/store/mwviyl7qy4cf4jp8ncsbmmac5nn89rrb-php-curl-7.4.6
  /nix/store/n7nbbw3gh9zhsg1dhiv0nwr50vjdjgy9-php-gmp-7.4.6
  /nix/store/ng9a1mxdd8agfhyi3pfriiv449pqw6iv-keyutils-1.6.1-lib
  /nix/store/nwsn18fysga1n5s0bj4jp4wfwvlbx8b1-glibc-2.30
  /nix/store/pgj5vsdly7n4rc8jax3x3sill06l44qp-libunistring-0.9.10
  /nix/store/pypl6crqv92spf9kwnvfc3xi7fng6z28-libzip-1.6.1
  /nix/store/q93limjg3z718fm1hnbwncbgk7cnf3ak-hook
  /nix/store/qrk3wxg8mh0iiv3r6nnk5lqhalsc519p-php-pdo-7.4.6
  /nix/store/r7pr8nbbh71i7hlv3mcf1aldyd6q3v8l-postgresql-11.7-lib
  /nix/store/r93qk32f45gka2v5p5cw9zkmy6y54c0f-libsodium-1.0.18
  /nix/store/r9ljg03f3c6iqf24gd22sz2rldwynxva-php-7.4.6
  /nix/store/ra5an7v0kwm1l12nzql47hl721vp94vg-libpng-apng-1.6.37
  /nix/store/rjx8nsjkmwfvi6gngv0m80a9xnnfd6x7-systemd-245.5-lib
  /nix/store/s8i90zkkazm8awj1cy2dqc6n02f7k062-php-filter-7.4.6
  /nix/store/s8nmjmdrx2bxl3w84vr72i5cl133sjs1-libtool-2.4.6-lib
  /nix/store/sd48hksc3cqn2pk2zw1s7vvkzqxh5hi2-pcre2-10.34
  /nix/store/si1xnmf2qnp6cxfjs9z0xjgvvimjk3i7-gd-2.3.0
  /nix/store/v4rqnzzknm3vlxk3mhay122npb7wslhi-icu4c-64.2
  /nix/store/v7c7pmlsln31dal7fjpkw7i73hvadzws-gzip-1.10
  /nix/store/vqvxm72cl54r12y2b0p8kzim5rk42sag-php-pcntl-7.4.6
  /nix/store/vwa91zih3w7y9qcd35smdnbjc92vvqlm-libcap-2.27-lib
  /nix/store/wcaq4scgrw7w4yx07njjsn9mkjrx6qc6-attr-2.4.48
  /nix/store/wp949qc64sqphg2s81n2xl70k295sf4b-db-4.8.30
  /nix/store/xgy96kzds2841cp7p6h6kw6ffrzzvyi5-lndir-1.0.3
  /nix/store/xlrszcrhr8qxklzphwi7mjf5pw61agwf-libtiff-4.1.0
  /nix/store/xnng7gm3iz8di5775xpkhlqq6hlm3rxw-php-fileinfo-7.4.6
  /nix/store/xr91p8swsmv7fx72pkizvvwxxfzq8swc-libwebp-1.0.3
  /nix/store/y154w6hwq3aprlgifgza92kq3j0p1bfa-onig-6.9.4
  /nix/store/y3axsbkhziamlp0hp9dh790xc3jf0wbv-php-calendar-7.4.6
  /nix/store/ypvdylzkz7j457fr50bsh0br4ah75zps-php-pdo_sqlite-7.4.6
  /nix/store/yyazdkikgnmg9rgdvbnrfn8k3q8wgf7v-dejavu-fonts-minimal-2.37
  /nix/store/z9kwjxxxv64ygc0vad0g44zybr7g500y-cyrus-sasl-2.1.27
  /nix/store/zfgr6zghjsr78ff2wlfbnlx6a8n4dh49-linux-pam-1.3.1
  /nix/store/zn1nw42k86wz3581xhsl9xkzzx0vazwv-php-pgsql-7.4.6
  /nix/store/zzg90fipwmmj60v12qwm69hq7vimarl1-libjpeg-turbo-2.0.4
copying path '/nix/store/6c8qwlya5kqqa16hnjjfn1kg7qm7wrp9-hook' from 'https://cache.nixos.org'...
copying path '/nix/store/pgj5vsdly7n4rc8jax3x3sill06l44qp-libunistring-0.9.10' from 'https://cache.nixos.org'...
copying path '/nix/store/yyazdkikgnmg9rgdvbnrfn8k3q8wgf7v-dejavu-fonts-minimal-2.37' from 'https://cache.nixos.org'...
copying path '/nix/store/11l898wc2q132fhk2ai875rz6qjh4mfp-fontconfig-2.12.6' from 'https://cache.nixos.org'...
copying path '/nix/store/9l6d9k9f0i9pnkfjkvsm7xicpzn4cv2c-libidn2-2.3.0' from 'https://cache.nixos.org'...
copying path '/nix/store/nwsn18fysga1n5s0bj4jp4wfwvlbx8b1-glibc-2.30' from 'https://cache.nixos.org'...
copying path '/nix/store/wcaq4scgrw7w4yx07njjsn9mkjrx6qc6-attr-2.4.48' from 'https://cache.nixos.org'...
copying path '/nix/store/81wybawvkr95c7j8gj5ab3y740mq1fli-bash-4.4-p23' from 'https://cache.nixos.org'...
copying path '/nix/store/7i9rqnwh3m53z5a4md9sdgk1fdgk7cw4-bzip2-1.0.6.0.1' from 'https://cache.nixos.org'...
copying path '/nix/store/9kpnm6wdaqzm26kbvcpk1an079rjy7qh-ed-1.16' from 'https://cache.nixos.org'...
copying path '/nix/store/2765gcl7nip27s125fsrpiiwd4d60vzr-expat-2.2.8' from 'https://cache.nixos.org'...
copying path '/nix/store/8kk107mbrs5xjil56hfzh3wwqqdmsvid-gawk-5.1.0' from 'https://cache.nixos.org'...
copying path '/nix/store/38kikfbry3674n6ihin9f3jklgksh5mi-giflib-5.2.1' from 'https://cache.nixos.org'...
copying path '/nix/store/244yvw8fnxdv6zfkq2c6jqmw35jg6ib7-gcc-9.3.0-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/a1zak2h51s5f2b8cfir98q4kgbrdr9ik-gnumake-4.2.1' from 'https://cache.nixos.org'...
copying path '/nix/store/932zigmrsz9lmds70l4ajbaci4wa073b-gnused-4.8' from 'https://cache.nixos.org'...
copying path '/nix/store/v7c7pmlsln31dal7fjpkw7i73hvadzws-gzip-1.10' from 'https://cache.nixos.org'...
copying path '/nix/store/ng9a1mxdd8agfhyi3pfriiv449pqw6iv-keyutils-1.6.1-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/bw561416fw1md9px25ixhwg4d955kh7m-libargon2-20190702' from 'https://cache.nixos.org'...
copying path '/nix/store/0m3sja529iqsyk07ng0w5agrfkdi8nci-acl-2.2.53' from 'https://cache.nixos.org'...
copying path '/nix/store/vwa91zih3w7y9qcd35smdnbjc92vvqlm-libcap-2.27-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/19hgni25hb2379ksk82ibk7v2nxv6ivm-libgpg-error-1.36' from 'https://cache.nixos.org'...
copying path '/nix/store/25p58pc4cb5gxqx0kd3p9blkc29cfa1s-bzip2-1.0.6.0.1-bin' from 'https://cache.nixos.org'...
copying path '/nix/store/zzg90fipwmmj60v12qwm69hq7vimarl1-libjpeg-turbo-2.0.4' from 'https://cache.nixos.org'...
copying path '/nix/store/r93qk32f45gka2v5p5cw9zkmy6y54c0f-libsodium-1.0.18' from 'https://cache.nixos.org'...
copying path '/nix/store/s8nmjmdrx2bxl3w84vr72i5cl133sjs1-libtool-2.4.6-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/3qgzqqamhnwm178amyb46pdrzx2nakl5-coreutils-8.31' from 'https://cache.nixos.org'...
copying path '/nix/store/kvdl1dd9q9mdwp2gipyvwrs16i4w75lq-gnutar-1.32' from 'https://cache.nixos.org'...
copying path '/nix/store/xgy96kzds2841cp7p6h6kw6ffrzzvyi5-lndir-1.0.3' from 'https://cache.nixos.org'...
copying path '/nix/store/3fhi862ac934c08z0xws5ypfbljfvgbf-lz4-1.9.2' from 'https://cache.nixos.org'...
copying path '/nix/store/j3005jdd48vhhm1n8jvznix7fayx01np-ncurses-6.2' from 'https://cache.nixos.org'...
copying path '/nix/store/f2l7l00zabsih8dm9df3af6k41nnqsyw-libgcrypt-1.8.5' from 'https://cache.nixos.org'...
copying path '/nix/store/3wwi17hszkg9jr12q2cy3d8q7vfqvp3i-nghttp2-1.40.0-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/y154w6hwq3aprlgifgza92kq3j0p1bfa-onig-6.9.4' from 'https://cache.nixos.org'...
copying path '/nix/store/b9yc1faqr159pwbrg9kabhl4zkpnk2v5-openssl-1.1.1g' from 'https://cache.nixos.org'...
copying path '/nix/store/ihv6ws6wwpribvfvyzg9swhp84y1qnih-patch-2.7.6' from 'https://cache.nixos.org'...
copying path '/nix/store/8a07wrvzqi7ak4b956nfclx0h3nfwl3b-pcre-8.44' from 'https://cache.nixos.org'...
copying path '/nix/store/sd48hksc3cqn2pk2zw1s7vvkzqxh5hi2-pcre2-10.34' from 'https://cache.nixos.org'...
copying path '/nix/store/q93limjg3z718fm1hnbwncbgk7cnf3ak-hook' from 'https://cache.nixos.org'...
copying path '/nix/store/mi6i4ifqzj4afyzp12lhbgzbqqw9x9sa-libkrb5-1.18' from 'https://cache.nixos.org'...
copying path '/nix/store/f65bsq61vkpzdw5nv1b2b87l5gh4ji12-libossp-uuid-1.6.2' from 'https://cache.nixos.org'...
copying path '/nix/store/bbylg4yz3cfc2v5aqzaf4x9dk9y5s2ci-php-bcmath-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/y3axsbkhziamlp0hp9dh790xc3jf0wbv-php-calendar-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/bv109wps3957kgwi0i84jy66k0zl5bca-php-ctype-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/hi5655s7r4p82blynf5s0xzavjw36mgn-gnugrep-3.4' from 'https://cache.nixos.org'...
copying path '/nix/store/dcwdvxfma1gxbdpv9blh97hxanh722z6-php-exif-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/xnng7gm3iz8di5775xpkhlqq6hlm3rxw-php-fileinfo-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/s8i90zkkazm8awj1cy2dqc6n02f7k062-php-filter-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/d9lgc4z622qqyczycca641w68bz4rcwx-php-ftp-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/3zvslnwhgryvpz641x16jayljd5br2c1-php-gettext-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/ggxka4dd4swfh7xj63gpipvayzz0h34n-php-iconv-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/8d1cfzfsnsh9sjrj11lvwfq8w9kd748p-libedit-20191231-3.1' from 'https://cache.nixos.org'...
copying path '/nix/store/d4hjldzdfg2msya68ym50fvbq6a0a6k0-diffutils-3.7' from 'https://cache.nixos.org'...
copying path '/nix/store/wp949qc64sqphg2s81n2xl70k295sf4b-db-4.8.30' from 'https://cache.nixos.org'...
copying path '/nix/store/5vd37kgp8vla92k3g1w9ka3fwkqqd3sp-db-5.3.28' from 'https://cache.nixos.org'...
copying path '/nix/store/hd2bn6gccjdwl1diikqvjjgvkz94rgk7-findutils-4.7.0' from 'https://cache.nixos.org'...
copying path '/nix/store/cb6kgg6r94nwwwnc3xqadknl8cc5dxmb-gmp-6.2.0' from 'https://cache.nixos.org'...
copying path '/nix/store/v4rqnzzknm3vlxk3mhay122npb7wslhi-icu4c-64.2' from 'https://cache.nixos.org'...
copying path '/nix/store/58vavyggrv0s48l5fshif4c8vswlhp5x-patchelf-0.9' from 'https://cache.nixos.org'...
copying path '/nix/store/1d7f7h7l5nwwc3381knhp5w1xsi9xigi-php-json-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/2b1pws4l1w26qy2b2hpiqw3z6ynlaqrx-php-mbstring-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/jjbrhv20gq9bddq7ci2j3y2lywbxhz5h-php-mysqli-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/8bv2fcwc0xa2qx991yx40jczi4g0214b-php-opcache-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/vqvxm72cl54r12y2b0p8kzim5rk42sag-php-pcntl-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/qrk3wxg8mh0iiv3r6nnk5lqhalsc519p-php-pdo-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/cdf32k913rjyd4bjswnwyk37cz638pw5-php-pdo_mysql-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/02wjmrmh5r2w1qbny1q15s0d3bnvjz0g-php-posix-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/10ik7zb8h733diqf9i74s28hraaf5k63-php-readline-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/2vjzwmx33rhyc5nswqlgdksfhnqz2a2a-php-session-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/7azmbw8nz93ff4k3b4qmbi32p0zp2gdd-php-sockets-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/42q2czd5igvq2i54cvgkzz71081nnyyd-php-sodium-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/n7nbbw3gh9zhsg1dhiv0nwr50vjdjgy9-php-gmp-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/lj1007wk22rhqfbwgx2yrglbk8hbkzmc-php-tokenizer-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/0im1v7xmmbvs20l0j7qzy90nlhzpcfnl-unixODBC-2.3.7' from 'https://cache.nixos.org'...
copying path '/nix/store/gv5yhri5rp7sqdxa78aqc59ivyza059q-xz-5.2.5' from 'https://cache.nixos.org'...
copying path '/nix/store/a6sbfdmqnw16i0giiv2dnwfg83gznnfj-zlib-1.2.11' from 'https://cache.nixos.org'...
copying path '/nix/store/13xz1n66rpb95knvvfn0gkzy9id6b8l5-php-openssl-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/fjim66v7ddsv2rbz8sflj0gi8ybc2486-cracklib-2.9.7' from 'https://cache.nixos.org'...
copying path '/nix/store/ra5an7v0kwm1l12nzql47hl721vp94vg-libpng-apng-1.6.37' from 'https://cache.nixos.org'...
copying path '/nix/store/8l6knfgrr33vagcw9y40dwlsihwvpq3q-libssh2-1.9.0' from 'https://cache.nixos.org'...
copying path '/nix/store/gxddlgixdc3wvp82hw05fvw9r2bds5q0-libxml2-2.9.10' from 'https://cache.nixos.org'...
copying path '/nix/store/pypl6crqv92spf9kwnvfc3xi7fng6z28-libzip-1.6.1' from 'https://cache.nixos.org'...
copying path '/nix/store/hp3a4ryjx39f7l59dslbbzpjawvqhqs4-php-mysqlnd-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/f0v2q4l68d304dszsm3njhsmjxq18h9r-php-zlib-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/k4lyqnhks8lihpvzklayh6b37r5krgpq-sqlite-3.31.1' from 'https://cache.nixos.org'...
copying path '/nix/store/xlrszcrhr8qxklzphwi7mjf5pw61agwf-libtiff-4.1.0' from 'https://cache.nixos.org'...
copying path '/nix/store/z9kwjxxxv64ygc0vad0g44zybr7g500y-cyrus-sasl-2.1.27' from 'https://cache.nixos.org'...
copying path '/nix/store/rjx8nsjkmwfvi6gngv0m80a9xnnfd6x7-systemd-245.5-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/b5jplc769pcsxy3ay1b75cwk6ca8r594-xz-5.2.5-bin' from 'https://cache.nixos.org'...
copying path '/nix/store/lq4lky36aw1rdgiffljg7mx8f4l8q28w-freetype-2.10.1' from 'https://cache.nixos.org'...
copying path '/nix/store/f0bj15hsyxp8zql86i75wi483zgldzy0-curl-7.69.1' from 'https://cache.nixos.org'...
copying path '/nix/store/i4cbsr80bpk7ad43gzxkgwbcay4yhsv7-php-zip-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/fs9h12v2q05fk5vqdw84pz7p21rfb050-php-pdo_odbc-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/44504dmip6m8yzbnbha4hjgxfqwvf653-openldap-2.4.50' from 'https://cache.nixos.org'...
copying path '/nix/store/xr91p8swsmv7fx72pkizvvwxxfzq8swc-libwebp-1.0.3' from 'https://cache.nixos.org'...
copying path '/nix/store/g3qrpg0miwpsd7vjdingzpqkg16w8hqs-stdenv-linux' from 'https://cache.nixos.org'...
copying path '/nix/store/mwviyl7qy4cf4jp8ncsbmmac5nn89rrb-php-curl-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/r9ljg03f3c6iqf24gd22sz2rldwynxva-php-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/9raydnks1f4wzny1k84z52y4aam0py6w-php-dom-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/10hjg81wn345djw2l4ig8fgy59ndmrw9-php-soap-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/97rhik3rqd56a5r856a3b156rzdzrh12-php-simplexml-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/37smvzh9m5b0rrl5iz0d1kfhmsq7mqmy-php-xmlreader-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/9w8ivkd7kpfanfp82zx6drky3infv0dv-php-xmlwriter-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/ypvdylzkz7j457fr50bsh0br4ah75zps-php-pdo_sqlite-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/k5g3bdlnwg1mzid6080zgv096rxgbbkq-fontconfig-2.12.6-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/9nknbj0mnv56wf42hb8i1aah0w8mb2ca-php-sqlite3-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/r7pr8nbbh71i7hlv3mcf1aldyd6q3v8l-postgresql-11.7-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/si1xnmf2qnp6cxfjs9z0xjgvvimjk3i7-gd-2.3.0' from 'https://cache.nixos.org'...
copying path '/nix/store/fhhyq76n7b4r7q7fs5yahh9ryj4ps3y8-php-gd-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/kyjax9kfrg3gmq3rnrc1a39g5wh6ffzg-php-ldap-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/89v868vjf7ywafvaj47024nf3wba9kny-php-pdo_pgsql-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/zn1nw42k86wz3581xhsl9xkzzx0vazwv-php-pgsql-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/zfgr6zghjsr78ff2wlfbnlx6a8n4dh49-linux-pam-1.3.1' from 'https://cache.nixos.org'...
copying path '/nix/store/6n32lszy7ks2wb532w4p3xvn66lnjxqw-php-imap-7.4.6' from 'https://cache.nixos.org'...
copying path '/nix/store/lpgpdbkwpk9gh84cfi3vfv4qj10hjm77-php-intl-7.4.6' from 'https://cache.nixos.org'...
building '/nix/store/2mx6w89xmpasjprysf3qqdw1d73k15vk-php.ini.drv'...
building '/nix/store/0smqcqpx4r3gz3b0pi0dbbs0hs9fdkk6-php-with-extensions-7.4.6.drv'...
building '/nix/store/2q1705yb072hwwp9y37k3g78k17n40kx-user-environment.drv'...
error: packages '/nix/store/bs0xsqvczk0vz24cnyhrm6mln8damdpg-php-with-extensions-7.4.6/share/man/man1/php-cgi.1.gz' and '/nix/store/1qxflx934dhic4spypv71ychld750j5h-php-7.3.11/share/man/man1/php-cgi.1.gz' have the same priority 5; use 'nix-env --set-flag priority NUMBER INSTALLED_PKGNAME' to change the priority of one of the conflicting packages (0 being the highest priority)
builder for '/nix/store/2q1705yb072hwwp9y37k3g78k17n40kx-user-environment.drv' failed with exit code 1
error: build of '/nix/store/2q1705yb072hwwp9y37k3g78k17n40kx-user-environment.drv' failed

[Ma27]

On which revision of nixpkgs did you see the bad 'meta.outputsToinstall-error? And does it also occur on the release channel?

The second log doesn't seem to be a bug though since this only occurs when several packages installed by nix-env have conflicting paths. Can you therefore please post the output of nix-env -q?

[chrissound]

Not sure how to check the nixpkgs version for the first instance. But for the docker image in question it's:
nixos/nix@sha256:399eb8b7faf90fd010674da906366bbb2391f04577c0365a4d7d9300678e84c1

For the nixos machine the output of:

nix-env -q | cat
anki-2.1.15
arion-0.1.0.0
audio-recorder-2.1.3
bhoogle-0.1.3.5
bridge-utils-1.5
brittany-0.12.0.0
circleci-cli-0.1.2569
composer-robmorgan-phinx
composer-svanderburg-composer2nix
consul-1.6.0
cpulimit-2.6
enpass-6.0.1.239
envsubst-1.1.0
extundelete-0.2.4
fast-tags-1.5.0
filezilla-3.44.2
gftp-2.0.19
gImageReader-3.3.1
gimp-2.10.14
gitchapter-0.1.0.0
gnumake-4.2.1
gthumb-3.8.2
guvcview-2.0.6
HaskellNixCabalStarter-0.1.0.0
htop-2.2.0
interactiveghci-0.1.0.0
iptables-1.8.3
jl-0.0.5
k9s-0.7.13
kind-0.5.1
kubectx-0.7.1
Monadoro-0.2.1.5
moreutils-0.63
neofetch-6.1.0
nix-deploy-1.0.4
nix-serve-0.2-e4675e3
nixos-shell
onboard-1.4.1
openapi-generator-cli-4.1.0
pandoc-2.7.3
php-7.3.11
pkg-config-0.29.2
pypi2nix-1.8.1
python3-3.9.0a3
siege-4.0.4
sshuttle-0.78.5
stress-ng-0.10.02
supertuxkart-1.0
sysbench-1.0.17
sysfsutils-2.1.0
terraform-0.12.8
tig-2.4.1
tmuxp-1.5.3
travis-1.8.10
tunctl-1.5
vimplugin-spacevim-2018-03-29
vimplugin-youcompleteme-2019-08-10
wireguard-tools-1.0.20200206
woeusb-3.3.0
xev-1.2.3
xhost-1.0.8
ycmd-2018-09-20
youtube-dl-2020.01.24
yq-2.8.1
zoom-us-3.5.330166.1202

For the docker container:

cb84c4b79d05:/# nix-env -q | cat
nix-2.3.4
nss-cacert-3.49.2

[Ma27]

Well, on your machine you already have a php installed and you seem to try installing another php-derivation as well which leads to conflicts in your profile.

Unfortunately I cannot reproduce the issue in a docker-container. I'm using nixos/nix as well at the following state:

 - system: `"x86_64-linux"`
 - host os: `Linux 5.6.12, Alpine Linux, noversion`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.3`
 - channels(root): `"nixpkgs-20.03pre194957.bef773ed53f"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixpkgs`

As already noted in the bug-report template, this can be retrieved using nix-info. Please provide this kind of information and optionally try to upgrade the nix-channel in your container.

[chrissound]

That makes sense (conflicting version).

cb84c4b79d05:/# nix-shell -p nix-info --run "nix-info -m"
these paths will be fetched (0.00 MiB download, 0.00 MiB unpacked):
  /nix/store/3paywclzw9rcwy6l3709r1al34qizms4-nix-info
copying path '/nix/store/3paywclzw9rcwy6l3709r1al34qizms4-nix-info' from 'https://cache.nixos.org'...
 - system: `"x86_64-linux"`
 - host os: `Linux 4.19.102, Alpine Linux, noversion`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.3.4`
 - channels(root): `"nixpkgs-20.09pre224255.e23f5308583"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixpkgs`

---

After running nixos-channel --update, nix-env -iA nixpkgs.php installs successfully. Not sure if this is an issue in this case then?

Thanks for the help! Sorry for missing the nix-info section.

[Ma27]

Ah, just realized that this used to be an issue on master after several refactorings in the php-derivation and was fixed in #87138.

Since this has to be fixed by simply updating the nix-channel and I can't reproduce it as well, this should be safe to close now.