Add funktion to make easy shell builders

busybox.nix

@@ -40,4 +40,26 @@ in rec {
     passAsFile = [ "buildscript" ];
     args = [ "sh" "-c" "${busybox}/busybox sh $buildscriptPath" ];
   };
+
+  shellDerivation = { name
+    ,  buildscript
+  }: builtins.derivation {
+    system = "x86_64-linux";
+    inherit name;
+    builder = utils + /sh;
+    shellenvironment = ''
+      export PATH=${utils}
+      sh $buildscriptPath
+    '';
+    inherit buildscript;
+    passAsFile = [ "shellenvironment" "buildscript" ];
+    args = [ "-c" "${utils}/sh $shellenvironmentPath" ];
+  };
+
+  test = shellDerivation {
+    name = "test";
+    buildscript = ''
+      w > $out
+    '';
+  };
 }