diff --git a/packages/genodelabs/default.nix b/packages/genodelabs/default.nix
index 8e4edcd..bd81d2f 100644
--- a/packages/genodelabs/default.nix
+++ b/packages/genodelabs/default.nix
@@ -199,74 +199,75 @@ let
       portInputs' = portInputs
         ++ lib.concatMap (builtins.getAttr "portInputs") depotInputs';
 
-    in stdenv'.mkDerivation (extraAttrs // {
-      pname = name;
-      inherit (genodeSources) version;
-      enableParallelBuilding = true;
+      self = stdenv'.mkDerivation (extraAttrs // {
+        pname = name;
+        inherit (genodeSources) version;
+        enableParallelBuilding = true;
 
-      nativeBuildInputs = with buildPackages.buildPackages;
-        [ binutils bison flex stdenv.cc tcl which ] ++ nativeBuildInputs;
+        nativeBuildInputs = with buildPackages.buildPackages;
+          [ binutils bison flex stdenv.cc tcl which ] ++ nativeBuildInputs;
 
-      src = genodeSources;
-      # The genode source tree must be copied to the build directory
-      # because the depot tool must modify the source tree as it runs.
+        src = genodeSources;
+        # The genode source tree must be copied to the build directory
+        # because the depot tool must modify the source tree as it runs.
 
-      configurePhase = let
-        copyPorts = # wasteful copy
-          toString
-          (builtins.map (drv: " cp -r ${drv}/* $CONTRIB_DIR/;") portInputs');
-      in ''
-        runHook preConfigure
-        export GENODE_DIR=$(pwd)
-        export CONTRIB_DIR=$GENODE_DIR/contrib
-        export DEPOT_DIR=$GENODE_DIR/depot
-        mkdir -p $CONTRIB_DIR; ${copyPorts}
-        chmod +rwX -R .
-        runHook postConfigure
-      '';
+        configurePhase = let
+          copyPorts = # wasteful copy
+            toString
+            (builtins.map (drv: " cp -r ${drv}/* $CONTRIB_DIR/;") portInputs');
+        in ''
+          runHook preConfigure
+          export GENODE_DIR=$(pwd)
+          export CONTRIB_DIR=$GENODE_DIR/contrib
+          export DEPOT_DIR=$GENODE_DIR/depot
+          mkdir -p $CONTRIB_DIR; ${copyPorts}
+          chmod +rwX -R .
+          runHook postConfigure
+        '';
 
-      STRIP_TARGET_CMD = "cp $< $@";
-      # defer strip until fixup phase
+        STRIP_TARGET_CMD = "cp $< $@";
+        # defer strip until fixup phase
 
-      makefile = "tool/depot/create";
-      makeFlags = [
-        "genodelabs/bin/${arch}/${name}"
+        makefile = "tool/depot/create";
+        makeFlags = [
+          "genodelabs/bin/${arch}/${name}"
 
-        # by default the build system will refuse to be useful
-        "FORCE=1"
-        "KEEP_BUILD_DIR=1"
-        "UPDATE_VERSIONS=1"
-        "VERBOSE="
-      ];
+          # by default the build system will refuse to be useful
+          "FORCE=1"
+          "KEEP_BUILD_DIR=1"
+          "UPDATE_VERSIONS=1"
+          "VERBOSE="
+        ];
 
-      installPhase = ''
-        runHook preInstall
-        rm -r depot/genodelabs/bin/${arch}/${name}/*\.build
+        installPhase = ''
+          runHook preInstall
+          rm -r depot/genodelabs/bin/${arch}/${name}/*\.build
 
-        local outputBinDir="''${!outputBin}/bin"
-        local outputLibDir="''${!outputLib}/lib"
-        find depot/genodelabs/bin/${arch}/${name} -name '*.lib.so' \
-          -exec install -Dt "$outputLibDir" {} \; -delete
-        if [ -d "$outputLibDir" ]; then
-          pushd "$outputLibDir"
-          for src in *.lib.so; do
-            dst=$src
-            dst="''${dst#lib}"
-            dst="''${dst%.lib.so}"
-            ln -s "$src" lib"$dst".so
-          done
-          popd
-        fi
+          local outputBinDir="''${!outputBin}/bin"
+          local outputLibDir="''${!outputLib}/lib"
+          find depot/genodelabs/bin/${arch}/${name} -name '*.lib.so' \
+            -exec install -Dt "$outputLibDir" {} \; -delete
+          if [ -d "$outputLibDir" ]; then
+            pushd "$outputLibDir"
+            for src in *.lib.so; do
+              dst=$src
+              dst="''${dst#lib}"
+              dst="''${dst%.lib.so}"
+              ln -s "$src" lib"$dst".so
+            done
+            popd
+          fi
 
-        find depot/genodelabs/bin/${arch}/${name} -executable \
-          -exec install -Dt "$outputBinDir" {} \;
+          find depot/genodelabs/bin/${arch}/${name} -executable \
+            -exec install -Dt "$outputBinDir" {} \;
 
-        runHook postInstall
-      '';
+          runHook postInstall
+        '';
 
-      passthru = { inherit depotInputs portInputs; };
-      meta = { platforms = lib.platforms.genode; } // meta;
-    });
+        passthru = { inherit portInputs depotInputs; };
+        meta = { platforms = lib.platforms.genode; } // meta;
+      });
+    in self;
 
   makePackages = let
     overrides = import ./make-targets.nix {