Add package for 'fira-mono'.

pkgs/data/fonts/fira-mono/default.nix

@@ -0,0 +1,33 @@
+{ stdenv, fetchurl, unzip }:
+
+stdenv.mkDerivation rec {
+  name = "fira-mono-3.2";
+
+  src = fetchurl {
+    url = http://www.carrois.com/downloads/fira_mono_3_2/FiraMonoFonts3200.zip;
+    sha256 = "0g3i54q8czf3vylgasj62w2n7l1a2yrbyibjlx1qk3awh7fr1r7p";
+  };
+
+  buildInputs = [ unzip ];
+  phases = [ "unpackPhase" "installPhase" ];
+  sourceRoot = "FiraMonoFonts3200";
+
+  installPhase = ''
+    mkdir -p $out/share/fonts/opentype
+    find . -name "*.otf" -exec cp -v {} $out/share/fonts/opentype \;
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = http://www.carrois.com/fira-4-1/;
+    description = "Monospace font for Firefox OS";
+    longDescription = ''
+      Fira Mono is a monospace font designed by Erik Spiekermann,
+      Ralph du Carrois, Anja Meiners and Botio Nikoltchev of Carrois
+      Type Design for Mozilla Firefox OS. Available in Regular,
+      Medium, and Bold.
+    '';
+    license = licenses.ofl;
+    maintainers = [ maintainers.rycee ];
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -9754,6 +9754,8 @@ let
 
   fira = callPackage ../data/fonts/fira { };
 
+  fira-mono = callPackage ../data/fonts/fira-mono { };
+
   freefont_ttf = callPackage ../data/fonts/freefont-ttf { };
 
   freepats = callPackage ../data/misc/freepats { };