treewide: stop using fontbhttf

pkgs/development/libraries/fontconfig/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, freetype, expat, libxslt, fontbhttf
+{ stdenv, fetchurl, fetchpatch, pkgconfig, freetype, expat, libxslt, dejavu_fonts
 , substituteAll }:
 
 /** Font configuration scheme
@@ -44,8 +44,8 @@ stdenv.mkDerivation rec {
   configureFlags = [
     "--with-cache-dir=/var/cache/fontconfig" # otherwise the fallback is in $out/
     "--disable-docs"
-    # just ~1MB; this is what you get when loading config fails for some reason
-    "--with-default-fonts=${fontbhttf}"
+    # just <1MB; this is what you get when loading config fails for some reason
+    "--with-default-fonts=${dejavu_fonts.minimal}"
   ];
 
   # We should find a better way to access the arch reliably.
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
 
   postInstall = ''
     cd "$out/etc/fonts"
-    "${libxslt.bin}/bin/xsltproc" --stringparam fontDirectories "${fontbhttf}" \
+    "${libxslt.bin}/bin/xsltproc" --stringparam fontDirectories "${dejavu_fonts.minimal}" \
       --stringparam fontconfigConfigVersion "${configVersion}" \
       --path $out/share/xml/fontconfig \
       ${./make-fonts-conf.xsl} $out/etc/fonts/fonts.conf \

pkgs/development/libraries/fontconfig/make-fonts-cache.nix

@@ -1,4 +1,4 @@
-{ runCommand, lib, writeText, fontconfig, fontbhttf, fontDirectories }:
+{ runCommand, lib, writeText, fontconfig, fontDirectories }:
 
 runCommand "fc-cache"
   rec {

pkgs/development/libraries/fontconfig/make-fonts-conf.nix

@@ -1,10 +1,10 @@
-{ runCommand, libxslt, fontconfig, fontbhttf, fontDirectories }:
+{ runCommand, libxslt, fontconfig, dejavu_fonts, fontDirectories }:
 
 runCommand "fonts.conf"
   {
     buildInputs = [ libxslt fontconfig ];
-    # Add a default font for non-nixos systems. fontbhttf is only about 1mb.
-    fontDirectories = fontDirectories ++ [ fontbhttf ];
+    # Add a default font for non-nixos systems, <1MB and in nixos defaults.
+    fontDirectories = fontDirectories ++ [ dejavu_fonts.minimal ];
   }
   ''
     xsltproc --stringparam fontDirectories "$fontDirectories" \