Build failure: ffmpeg-full

[uninsane]

Nixpkgs version

• Unstable (25.05)

Steps to reproduce

$ git checkout 9f511525b00e57477826895dcc17ffa42a2186c5  # master as of 2025-03-24 16:26:11
$ nix-build -A ffmpeg-full

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Link to Hydra build job

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Relevant log output

this derivation will be built:
  /nix/store/y4fnclnjqzxzq2kph0m9znh6j1kw6yir-ffmpeg-full-7.1.1.drv
building '/nix/store/y4fnclnjqzxzq2kph0m9znh6j1kw6yir-ffmpeg-full-7.1.1.drv'...
Running phase: unpackPhase
unpacking source archive /nix/store/dr00262f0i2fr7n1xjsqp4vj22ch8294-ffmpeg
source root is ffmpeg
Running phase: patchPhase
applying patch /nix/store/6v7njhg0nxy4lhs892fmg94rmygvdk0h-add-av_stream_get_first_dts-for-chromium.patch
patching file libavformat/avformat.h
Hunk #1 succeeded at 1202 with fuzz 2 (offset 74 lines).
patching file libavformat/mux_utils.c
Hunk #1 succeeded at 30 with fuzz 2 (offset -7 lines).
patching script interpreter paths in .
./tools/patcheck: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/general_assembly.pl: interpreter directive changed from "#!/usr/bin/env perl" to "/nix/store/8v0r6qxs5cps7cgcjp215895wja6k0by-perl-5.40.0/bin/perl"
./tools/source2c: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/gen-rc: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/dvd2concat: interpreter directive changed from "#!/usr/bin/env perl" to "/nix/store/8v0r6qxs5cps7cgcjp215895wja6k0by-perl-5.40.0/bin/perl"
./tools/unwrap-diff: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/target_dec_fate.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/plotframes: interpreter directive changed from "#!/usr/bin/env perl" to "/nix/store/8v0r6qxs5cps7cgcjp215895wja6k0by-perl-5.40.0/bin/perl"
./tools/murge: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/missing_codec_desc: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/make_chlayout_test: interpreter directive changed from "#!/usr/bin/env perl" to "/nix/store/8v0r6qxs5cps7cgcjp215895wja6k0by-perl-5.40.0/bin/perl"
./tools/libav-merge-next-commit: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/clean-diff: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tools/bisect-create: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tests/fate/source-check.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tests/fate.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tests/fate-run.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./tests/copycooker.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./ffbuild/libversion.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./ffbuild/version.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./ffbuild/pkgconfig_generate.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./doc/doxy-wrapper.sh: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./configure: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./compat/windows/mswindres: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./compat/windows/mslink: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./compat/windows/makedef: interpreter directive changed from "#!/bin/sh" to "/nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37/bin/sh"
./compat/solaris/make_sunver.pl: interpreter directive changed from "#!/usr/bin/env perl" to "/nix/store/8v0r6qxs5cps7cgcjp215895wja6k0by-perl-5.40.0/bin/perl"
substituteStream() in derivation ffmpeg-full-7.1.1: WARNING: '--replace' is deprecated, use --replace-{fail,warn,quiet}. (file 'libavfilter/vf_frei0r.c')
Running phase: updateAutotoolsGnuConfigScriptsPhase
Running phase: configurePhase
patching script interpreter paths in ./configure
configure flags: --disable-static --prefix=/nix/store/64dl8sh5915kpf6dfd5ifcdk0afs411s-ffmpeg-full-7.1.1 --target_os=linux --arch=x86_64 --pkg-config=pkg-config --enable-gpl --enable-version3 --disable-nonfree --disable-static --enable-shared --enable-pic --disable-thumb --disable-small --enable-runtime-cpudetect --enable-gray --enable-swscale-alpha --enable-hardcoded-tables --enable-safe-bitstream-reader --enable-pthreads --disable-w32threads --disable-os2threads --enable-network --enable-pixelutils --datadir=/nix/store/xvchzyrqfv6bnlx9pzy2szrldda5f129-ffmpeg-full-7.1.1-data/share/ffmpeg --enable-ffmpeg --enable-ffplay --enable-ffprobe --bindir=/nix/store/v9ydb3vayqc7hks8ibqfcd7hhrmlqzsj-ffmpeg-full-7.1.1-bin/bin --enable-avcodec --enable-avdevice --enable-avfilter --enable-avformat --enable-avutil --enable-postproc --enable-swresample --enable-swscale --libdir=/nix/store/s5gia9vvaxwqg1n0cxms2znyrxn7nn0x-ffmpeg-full-7.1.1-lib/lib --incdir=/nix/store/gk6npm69pid7sy3y4xx5h42s9zmrxjdk-ffmpeg-full-7.1.1-dev/include --enable-doc --enable-htmlpages --enable-manpages --mandir=/nix/store/r5nq7aqqjz33r3nx36filwmkzy6d9x17-ffmpeg-full-7.1.1-man/share/man --enable-podpages --enable-txtpages --docdir=/nix/store/wqvbf1r5gn1vcgj9wp6wkgdj7yxgg917-ffmpeg-full-7.1.1-doc/share/doc/ffmpeg --enable-alsa --enable-amf --enable-libaom --enable-libaribb24 --enable-libaribcaption --enable-libass --enable-avisynth --enable-libbluray --enable-libbs2b --enable-bzlib --enable-libcaca --enable-libcdio --enable-libcelt --enable-chromaprint --enable-libcodec2 --enable-cuda --enable-cuda-llvm --disable-cuda-nvcc --enable-cuvid --enable-libdav1d --enable-libdc1394 --enable-libdrm --enable-libdvdnav --enable-libdvdread --disable-libfdk-aac --enable-ffnvcodec --enable-libflite --enable-fontconfig --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libfribidi --enable-libgme --enable-gnutls --enable-libgsm --enable-libharfbuzz --enable-iconv --enable-libilbc --enable-libjack --enable-libjxl --enable-libkvazaar --enable-ladspa --enable-liblc3 --enable-liblcevc-dec --enable-lcms2 --enable-lzma --disable-metal --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libmysofa --disable-libnpp --enable-nvdec --enable-nvenc --enable-openal --enable-opencl --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-opengl --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libplacebo --enable-libpulse --enable-libqrencode --enable-libquirc --enable-librav1e --enable-librist --enable-librtmp --enable-librubberband --enable-libsmbclient --enable-sdl2 --enable-libshaderc --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-librsvg --enable-libsvtav1 --disable-libtensorflow --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-v4l2-m2m --enable-vaapi --enable-vdpau --disable-libvpl --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-vulkan --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxcb --enable-libxcb-shape --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxevd --enable-libxeve --enable-xlib --enable-libxml2 --enable-libxvid --enable-libzimg --enable-zlib --enable-libzmq --enable-libzvbi --disable-debug --enable-optimizations --disable-extra-warnings --disable-stripping
ERROR: lcevc_dec >= 2.0.0 not found using pkg-config

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.libera.chat.
Include the log file "ffbuild/config.log" produced by configure as this will help
solve the problem.

Additional context

#392115 recently bumped the library which ffmpeg errors on: lcevcdec

System metadata

$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 6.13.7, NixOS, 25.05 (Warbler), 25.05pre-git`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.24.12`
 - nixpkgs: `/home/colin/src/nixos/nixpkgs`

Notify maintainers

ffmpeg maintainers: @Atemu @jopejoe1 @emilazy

---

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[thefossguy]

The build error message specifies that the version of lcevc_dec not greater-than-or-equal to 2.0.0.

ffmpeg-full> ERROR: lcevc_dec >= 2.0.0 not found using pkg-config
ffmpeg-full>
ffmpeg-full> If you think configure made a mistake, make sure you are using the latest
ffmpeg-full> version from Git.  If the latest version fails, report the problem to the
ffmpeg-full> ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.libera.chat.
ffmpeg-full> Include the log file "ffbuild/config.log" produced by configure as this will help
ffmpeg-full> solve the problem.

At the time of writing this, nixpkgs master is at 995d7da02d6d3c46773ee549c919e6d53169000e. But package lcevcdec is at version 3.3.5.

[thefossguy]

Ah, the version field is empty in the lcevc_dec.pc file:

prefix=${pcfiledir}/../..
libdir=/nix/store/rziv2fqxqhh4nb9q3aykxhr2fmvwk64g-lcevcdec-3.3.5-lib/lib
includedir=/nix/store/gkic4l5hajqd9zg4w4rj3b4pfiwc1h02-lcevcdec-3.3.5-dev/include

Name: lcevc_dec
Description: LCEVC Decoder SDK
Version: 
Libs: -L"${libdir}" -llcevc_dec_api
Libs.private: -lpthread -llcevc_dec_core
Cflags: -I"${includedir}"

[FliegendeWurst]

I wonder why nixpkgs-review reported ffmpeg-full as building successfully (#392115 (comment))

[thefossguy]

Maybe the version check was not present while merging that PR? That could've been introduced with the ffmpeg's version bump.

[thefossguy]

What I don't understand is why the version being passed to makePkgconfigItem isn't working. But, I can patch it out like so:

  preInstall = ''
    sed -i 's@^Version.*@Version: ${finalAttrs.version}@g' ./generated/*.pc
  '';

I also tried specifying version instead of inheriting it, but it still fails with an empty version string.

-inherit (finalAttrs) version;
+version = finalAttrs.version;

[FliegendeWurst]

Simple, the .pc from the upstream install script overwrites ours. PR to fix #392810