diff --git a/pkgs/development/libraries/gtk-sharp/builder.sh b/pkgs/by-name/gt/gtk-sharp-2_0/builder.sh
similarity index 100%
rename from pkgs/development/libraries/gtk-sharp/builder.sh
rename to pkgs/by-name/gt/gtk-sharp-2_0/builder.sh
diff --git a/pkgs/development/libraries/gtk-sharp/2.0.nix b/pkgs/by-name/gt/gtk-sharp-2_0/package.nix
similarity index 100%
rename from pkgs/development/libraries/gtk-sharp/2.0.nix
rename to pkgs/by-name/gt/gtk-sharp-2_0/package.nix
diff --git a/pkgs/by-name/gt/gtk-sharp-3_0/builder.sh b/pkgs/by-name/gt/gtk-sharp-3_0/builder.sh
new file mode 100644
index 000000000000..946b65d98a58
--- /dev/null
+++ b/pkgs/by-name/gt/gtk-sharp-3_0/builder.sh
@@ -0,0 +1,9 @@
+genericBuild
+
+# !!! hack
+export ALL_INPUTS="$out $pkgs"
+
+find $out -name "*.dll.config" | while read configFile; do
+    echo "modifying config file $configFile"
+    $monoDLLFixer "$configFile"
+done
diff --git a/pkgs/development/libraries/gtk-sharp/3.0.nix b/pkgs/by-name/gt/gtk-sharp-3_0/package.nix
similarity index 100%
rename from pkgs/development/libraries/gtk-sharp/3.0.nix
rename to pkgs/by-name/gt/gtk-sharp-3_0/package.nix
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6545a0727f87..13d56a398066 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7002,10 +7002,6 @@ with pkgs;
     x11Support = true;
   };
 
-  gtk-sharp-2_0 = callPackage ../development/libraries/gtk-sharp/2.0.nix { };
-
-  gtk-sharp-3_0 = callPackage ../development/libraries/gtk-sharp/3.0.nix { };
-
   gtk-mac-integration-gtk2 = gtk-mac-integration.override {
     gtk = gtk2;
   };