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-rw-r--r--pkgs/applications/science/logic/acgtk/default.nix16
1 files changed, 12 insertions, 4 deletions
diff --git a/pkgs/applications/science/logic/acgtk/default.nix b/pkgs/applications/science/logic/acgtk/default.nix
index d4f0ac3e5044a..c627b8a3c8f5a 100644
--- a/pkgs/applications/science/logic/acgtk/default.nix
+++ b/pkgs/applications/science/logic/acgtk/default.nix
@@ -13,11 +13,19 @@ stdenv.mkDerivation {
     sha256 = "sha256-W/BDhbng5iYuiB7desMKvRtDFdhoaxiJNvNvtbLlA6E=";
   };
 
-  buildInputs = [ dune_2 ] ++ (with ocamlPackages; [
-    ocaml findlib ansiterminal cairo2 cmdliner fmt logs menhir menhirLib mtime sedlex yojson
-  ]);
+  strictDeps = true;
 
-  buildPhase = "dune build --profile=release";
+  nativeBuildInputs = with ocamlPackages; [ menhir ocaml findlib dune_2 ];
+
+  buildInputs = with ocamlPackages; [
+    ansiterminal cairo2 cmdliner fmt logs menhirLib mtime sedlex yojson
+  ];
+
+  buildPhase = ''
+    runHook preBuild
+    dune build --profile=release ''${enableParallelBuilding:+-j $NIX_BUILD_CORES}
+    runHook postBuild
+  '';
 
   installPhase = ''
     dune install --prefix $out --libdir $OCAMLFIND_DESTDIR