modules/test: switch to runCommand

modules/top-level/test.nix

@@ -46,15 +46,7 @@ in
     };
   };
 
-  config = {
+  config =
-    test.derivation = pkgs.stdenv.mkDerivation {
-      inherit (cfg) name;
-      dontUnpack = true;
-
-      nativeBuildInputs = [ config.finalPackage ];
-
-      # First check warnings/assertions, then run nvim
-      buildPhase =
     let
       showErr =
         name: lines:
@@ -72,6 +64,11 @@ in
         err + showErr name lines
       ) "" toCheck;
     in
+    {
+      test.derivation =
+        pkgs.runCommandNoCCLocal cfg.name { nativeBuildInputs = [ config.finalPackage ]; }
+          (
+            # First check warnings/assertions, then run nvim
             lib.optionalString (errors != "") ''
               echo -n ${lib.escapeShellArg errors}
               exit 1
@@ -88,12 +85,10 @@ in
                 echo "ERROR: $output"
                 exit 1
               fi
-        '';
+            ''
-
+            + ''
-      # If we don't do this nix is not happy
-      installPhase = ''
               touch $out
-      '';
+            ''
-    };
+          );
     };
 }