enableGhostscriptFonts enabled, but no ghostscript fonts are showing up

[stepcut]

Issue description

I have enableGhostscriptFonts = true in my config,

      fonts = {
        enableGhostscriptFonts = true;
        fonts = with pkgs; [
  	  liberation_ttf
          fonts-arphic-ukai
        ];
      };

The ghostscript fonts are visible to fc-cache and fc-cat, but not fc-list or fc-match.

When I run fc-cache -rv the fonts are found in the ghostscript directory:

[jeremy@webserver:/etc/fonts]$ fc-cache -rv
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share: caching, new cache contents: 0 fonts, 2 dirs
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/doc: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/doc/liberation-fonts-2.00.1: caching, new cache contents: 0 fonts, 0 dirs
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype: caching, new cache contents: 12 fonts, 0 dirs
/nix/store/a4zxlbgya1zcmqq4skw5ich7c1gz0brq-fonts-arphic-ukai-0.2.20080216.2: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/a4zxlbgya1zcmqq4skw5ich7c1gz0brq-fonts-arphic-ukai-0.2.20080216.2/share: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/a4zxlbgya1zcmqq4skw5ich7c1gz0brq-fonts-arphic-ukai-0.2.20080216.2/share/fonts: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/a4zxlbgya1zcmqq4skw5ich7c1gz0brq-fonts-arphic-ukai-0.2.20080216.2/share/fonts/truetype: caching, new cache contents: 4 fonts, 0 dirs
/nix/store/klfw8kyvxrn87cjc4b57p8r5lafz7yjc-ghostscript-9.25/share/ghostscript/fonts: caching, new cache contents: 52 fonts, 0 dirs
/home/jeremy/.local/share/fonts: caching, new cache contents: 52 fonts, 0 dirs
/nix/store/8gn2b5vvlazg608cj1y5l4igp9rckmnq-dejavu-fonts-minimal-2.37: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/8gn2b5vvlazg608cj1y5l4igp9rckmnq-dejavu-fonts-minimal-2.37/share: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/8gn2b5vvlazg608cj1y5l4igp9rckmnq-dejavu-fonts-minimal-2.37/share/fonts: caching, new cache contents: 0 fonts, 1 dirs
/nix/store/8gn2b5vvlazg608cj1y5l4igp9rckmnq-dejavu-fonts-minimal-2.37/share/fonts/truetype: caching, new cache contents: 1 fonts, 0 dirs
/home/jeremy/.nix-profile/lib/X11/fonts: skipping, no such directory
/home/jeremy/.nix-profile/share/fonts: skipping, no such directory
/nix/var/nix/profiles/default/lib/X11/fonts: skipping, no such directory
/nix/var/nix/profiles/default/share/fonts: skipping, no such directory
/home/jeremy/.cache/fontconfig: cleaning cache directory
/var/cache/fontconfig: not cleaning non-existent cache directory
/nix/store/fk7yc2rzl3gcakwqmdqar8gfznma7fha-fc-cache: not cleaning unwritable cache directory
fc-cache: succeeded

And fc-cat | grep Nimbus shows multiple matches such as:

"n022024l.pfb" 0 "Nimbus Mono L:style=Bold Oblique:stylelang=en,en:slant=110:weight=200:width=100:foundry=urw:index=0:outline=True:scalable=True:charset=20-7e a0-17f 192 218-21b 2c6-2c7 2c9 2d8-2dd 394 3bc 400-45f 48c-4c4 4c7-4c8 4cb-4cc 4d0-4f5 4f8-4f9 2013-2014 2018-201a 201c-201e 2020-2022 2026 2030 2039-203a 2044 20ac 2116 2122 2202 2206 2211-2212 2215 2219-221a 221e 2260 2264-2265 25ca f6c3 fb01-fb02:lang=aa|ab|af|av|ay|ba|be|bg|bi|br|bs|bua|ca|ce|ch|chm|co|cs|cv|da|de|en|eo|es|et|eu|fi|fj|fo|fr|fur|fy|gd|gl|gv|ho|hr|hu|ia|id|ie|ik|io|is|it|kaa|ki|kk|kl|kum|kv|ky|la|lb|lez|lt|lv|mg|mh|mk|mo|mt|nb|nds|nl|nn|no|nr|nso|ny|oc|om|os|pl|pt|rm|ro|ru|sah|se|sel|sh|sk|sl|sma|smj|smn|so|sq|sr|ss|st|sv|sw|tg|tk|tl|tn|tr|ts|tt|tyv|uk|uz|vo|vot|wa|wen|wo|xh|yap|zu|an|crh|csb|fil|hsb|ht|jv|kj|ku-tr|kwm|lg|li|mn-mn|ms|na|ng|pap-an|pap-aw|rn|rw|sc|sg|sn|su|za:fontversion=0:fontformat=Type 1:decorative=False:postscriptname=NimbusMonL-BoldObli:color=False:symbol=False"

But when I run fc-list none of the ghostscript fonts show up:

$ fc-list
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationMono-Italic.ttf: Liberation Mono:style=Italic
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationSans-Italic.ttf: Liberation Sans:style=Italic
/nix/store/a4zxlbgya1zcmqq4skw5ich7c1gz0brq-fonts-arphic-ukai-0.2.20080216.2/share/fonts/truetype/ukai.ttc: AR PL UKai TW MBE:style=Book
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationSerif-Regular.ttf: Liberation Serif:style=Regular
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationSans-Bold.ttf: Liberation Sans:style=Bold
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationMono-BoldItalic.ttf: Liberation Mono:style=Bold Italic
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationSans-Regular.ttf: Liberation Sans:style=Regular
/nix/store/8gn2b5vvlazg608cj1y5l4igp9rckmnq-dejavu-fonts-minimal-2.37/share/fonts/truetype/DejaVuSans.ttf: DejaVu Sans:style=Book
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationSans-BoldItalic.ttf: Liberation Sans:style=Bold Italic
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationMono-Bold.ttf: Liberation Mono:style=Bold
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationSerif-Bold.ttf: Liberation Serif:style=Bold
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationMono-Regular.ttf: Liberation Mono:style=Regular
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationSerif-Italic.ttf: Liberation Serif:style=Italic
/nix/store/a4zxlbgya1zcmqq4skw5ich7c1gz0brq-fonts-arphic-ukai-0.2.20080216.2/share/fonts/truetype/ukai.ttc: AR PL UKai HK:style=Book
/nix/store/a4zxlbgya1zcmqq4skw5ich7c1gz0brq-fonts-arphic-ukai-0.2.20080216.2/share/fonts/truetype/ukai.ttc: AR PL UKai CN:style=Book
/nix/store/a4zxlbgya1zcmqq4skw5ich7c1gz0brq-fonts-arphic-ukai-0.2.20080216.2/share/fonts/truetype/ukai.ttc: AR PL UKai TW:style=Book
/nix/store/9agmxvxdpx2haqn4plrjl5ac7ki8mks3-liberation-fonts-2.00.1/share/fonts/truetype/LiberationSerif-BoldItalic.ttf: Liberation Serif:style=Bold Italic

And fc-match Nimbus does not match:

$ fc-match -s "Nimbus Mono L"
DejaVuSans.ttf: "DejaVu Sans" "Book"
LiberationMono-Regular.ttf: "Liberation Mono" "Regular"
LiberationSans-Regular.ttf: "Liberation Sans" "Regular"
LiberationSerif-Regular.ttf: "Liberation Serif" "Regular"
ukai.ttc: "AR PL UKai CN" "Book"
ukai.ttc: "AR PL UKai HK" "Book"
ukai.ttc: "AR PL UKai TW MBE" "Book"
LiberationSerif-Italic.ttf: "Liberation Serif" "Italic"

Technical details

 nix-info -m
 - system: `"x86_64-linux"`
 - host os: `Linux 4.4.36, NixOS, 19.03pre-git (Koi)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.1.3`
 - channels(root): `"nixos-16.09.666.3738950"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[stepcut]

Also important -- I tried copying the ghostscript fonts into my home directory. fc-cache sees them but fc-list ignores them there as well:

/home/jeremy/.local/share/fonts: caching, new cache contents: 52 fonts, 0 dirs

This is either a bug in fontconfig or (more likely?) some option in fonts.conf is telling fontconfig to ignore the fonts.

[stepcut]

I added the option:

fonts.fontconfig.allowType1 = true;

And now the ghostscript fonts are working. At a minimum the enableGhostscriptFonts documentation should mention this requirement. Even better would be if enableGhostscriptFonts enabled the option, or at least gave a warning or error if allowType1 is not true.

I am leaving this issue open since enableGhostscriptFonts = true is not sufficient to enable the ghostscript fonts.

[stale]

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