diff --git a/pkgs/data/fonts/tamsyn/default.nix b/pkgs/data/fonts/tamsyn/default.nix
index 380024e7e1a..10f96b2b17a 100644
--- a/pkgs/data/fonts/tamsyn/default.nix
+++ b/pkgs/data/fonts/tamsyn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, mkfontdir, mkfontscale }:
+{ stdenv, fetchurl, fontforge, mkfontscale }:
 
 let
   version = "1.11";
@@ -11,27 +11,32 @@ in stdenv.mkDerivation {
     sha256 = "0kpjzdj8sv5871b8827mjgj9dswk75h94jj5iia2bds18ih1pglp";
    };
 
-  nativeBuildInputs = [ mkfontdir mkfontscale ];
+  nativeBuildInputs = [ fontforge mkfontscale ];
 
   unpackPhase = ''
     tar -xzf $src --strip-components=1
   '';
 
-  installPhase = ''
-    # install the pcf fonts (for xorg applications)
-    fontDir="$out/share/fonts/tamsyn"
-    mkdir -p "$fontDir"
-    mv *.pcf "$fontDir"
-    mv *.psf.gz "$fontDir"
+  postBuild = ''
+    # convert pcf fonts to otb
+    for i in *.pcf; do
+      name=$(basename "$i" .pcf)
+      fontforge -lang=ff -c "Open(\"$i\"); Generate(\"$name.otb\")"
+    done
 
-    cd "$fontDir"
-    mkfontdir
-    mkfontscale
+    # compress pcf fonts
+    gzip -n -9 *.pcf
   '';
 
-  outputHashAlgo = "sha256";
-  outputHashMode = "recursive";
-  outputHash = "13l7ighfmn3kmqmchlksfg8ss22ndjk71rs0f9fn5p5zk7s4dn5x";
+  installPhase = ''
+    install -m 644 -D *.pcf.gz -t "$out/share/fonts/misc"
+    install -m 644 -D *.psf.gz -t "$out/share/consolefonts"
+    install -m 644 -D *.otb    -t "$otb/share/fonts/misc"
+    mkfontdir "$out/share/fonts/misc"
+    mkfontdir "$otb/share/fonts/misc"
+  '';
+
+  outputs = [ "out" "otb" ];
 
   meta = with stdenv.lib; {
     description = "A monospace bitmap font aimed at programmers";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index a8192f56c1b..1652c0011be 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -17951,7 +17951,7 @@ in
 
   inherit (callPackages ../data/fonts/tai-languages { }) tai-ahom;
 
-  tamsyn = callPackage ../data/fonts/tamsyn { };
+  tamsyn = callPackage ../data/fonts/tamsyn { inherit (buildPackages.xorg) mkfontscale; };
 
   tango-icon-theme = callPackage ../data/icons/tango-icon-theme {
     gtk = res.gtk2;