circt: fix build failure on darwin platforms

pkgs/by-name/ci/circt/circt-llvm.nix

@@ -80,7 +80,7 @@ stdenv.mkDerivation {
   #
   # Inspired by fixDarwinDylibNames.
   postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
-    local flags=(-delete_rpath @loader_path/../lib)
+    local flags
     for file in "$lib"/lib/*.dylib; do
       flags+=(-change @rpath/"$(basename "$file")" "$file")
     done

pkgs/by-name/ci/circt/package.nix

@@ -72,6 +72,12 @@ stdenv.mkDerivation rec {
   doCheck = true;
   checkTarget = "check-circt check-circt-integration";
 
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
+    echo moving libarc-jit-env.dylib to '$lib' before check because archilator links to the output path
+    mkdir -pv $lib/lib
+    cp -v ./lib/libarc-jit-env.dylib $lib/lib
+  '';
+
   outputs = [
     "out"
     "lib"