diff --git a/pkgs/games/build-support/build-game.nix b/pkgs/games/build-support/build-game.nix
index 459fca75..57fbe23c 100644
--- a/pkgs/games/build-support/build-game.nix
+++ b/pkgs/games/build-support/build-game.nix
@@ -9,7 +9,6 @@ assert withPulseAudio -> libpulseaudio != null;
 { buildInputs ? []
 , nativeBuildInputs ? []
 , preUnpack ? ""
-, setSourceRoot ? ""
 , runtimeDependencies ? []
 , sandbox ? {}
 , ...
@@ -30,7 +29,7 @@ buildSandbox (stdenv.mkDerivation ({
   # Try to evade tarbombs
   setSourceRoot = ''
     popd &> /dev/null
-  '' + lib.optionalString (setSourceRoot == "") ''
+  '' + attrs.setSourceRoot or ''
     sourceRoot="$(find "$name" -type d -exec sh -c '
       ndirs="$(find "$1" -mindepth 1 -maxdepth 1 -type d -printf x | wc -m)"
       nelse="$(find "$1" -mindepth 1 -maxdepth 1 ! -type d -printf x | wc -m)"
diff --git a/pkgs/games/humblebundle/default.nix b/pkgs/games/humblebundle/default.nix
index 656c06db..95996624 100644
--- a/pkgs/games/humblebundle/default.nix
+++ b/pkgs/games/humblebundle/default.nix
@@ -28,6 +28,7 @@ let
     owlboy = callPackage ./owlboy.nix {};
     pico-8 = callPackage ./pico-8.nix {};
     rocketbirds = callPackage ./rocketbirds.nix {};
+    spacechem = callPackage ./spacechem.nix {};
     spaz = callPackage ./spaz.nix {};
     starbound = callPackage ./starbound.nix {};
     swordsandsoldiers = callPackage ./swordsandsoldiers.nix {};
diff --git a/pkgs/games/humblebundle/spacechem.nix b/pkgs/games/humblebundle/spacechem.nix
new file mode 100644
index 00000000..ca6e252e
--- /dev/null
+++ b/pkgs/games/humblebundle/spacechem.nix
@@ -0,0 +1,71 @@
+{ stdenv, lib, fetchHumbleBundle, buildGame
+, SDL, SDL_mixer, SDL_image, SDL_net, SDL_gfx, SDL_ttf, smpeg
+, mono4, sqlite, coreutils, makeWrapper}:
+
+with lib;
+
+buildGame rec {
+  version = "1013_FIXED";
+  name = "spacechem-${version}";
+
+  src = fetchHumbleBundle {
+    name = "SpaceChem_Linux_v1013_FIXED.zip";
+    machineName = "spacechem_android_pc_soundtrack_linux";
+    downloadName = "download";
+    md5 = "c290e8631ae3380b7e70362501a5adb6";
+  };
+
+  buildInputs = [ makeWrapper ];
+
+  postPatch = let
+    dllmap = {
+      SDL = "${SDL}/lib/libSDL.so";
+      SDL_image = "${SDL_image}/lib/libSDL_image.so";
+      SDL_mixer = "${SDL_mixer}/lib/libSDL_mixer.so";
+      SDL_ttf = "${SDL_ttf}/lib/libSDL_ttf.so";
+      SDL_net = "${SDL_net}/lib/libSDL_net.so";
+      smpeg = "${smpeg}/lib/libsmpeg.so";
+      SDL_gfx = "${SDL_gfx}/lib/libSDL_gfx.so";
+    };
+  in ''
+    ${concatStrings (mapAttrsToList (dll: target: ''
+      sed -i -e '/<dllmap dll="${dll}\.dll">/,/<\/dllmap>/ {
+        /dllentry os="linux"/s!dll="[^"]*"!dll="'"${target}"'"!
+      }' SpaceChem/Tao.Sdl.dll.config
+    '') dllmap)}
+
+    rm SpaceChem/Mono.Security.dll
+    rm SpaceChem/spacechem-launcher.sh
+
+    cat > SpaceChem/System.Data.SQLite.dll.config <<EOF
+    <configuration>
+      <dllmap dll="sqlite3" target="${sqlite.out}/lib/libsqlite3.so" os="linux"/>
+    </configuration>
+    EOF
+    cat > SpaceChem/SpaceChem.exe.config <<EOF
+    <configuration>
+      <startup><supportedRuntime version="v4.0"/></startup></configuration>
+      <dllmap dll="sqlite3" target="${sqlite.out}/lib/libsqlite3.so" os="linux"/>
+    </configuration>
+    EOF
+  '';
+  # <defaultRuntime version="v4.0.30319"> 
+  #<startup><supportedRuntime version="v2.0.50727"/></startup></configuration>
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/lib
+    cp -rvt $out/lib SpaceChem
+
+    runHook postInstall
+  '';
+
+  # coreutils because Tao.OpenGL relies on uname for platform detection
+  postInstall = ''
+    makeWrapper ${mono4}/bin/mono $out/bin/spacechem \
+      --prefix PATH : ${coreutils}/bin              \
+      --run "cd $out/lib/SpaceChem"                 \
+      --add-flags $out/lib/SpaceChem/SpaceChem.exe
+  '';
+}