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-rw-r--r--pkgs/development/compilers/arachne-pnr/default.nix3
1 files changed, 2 insertions, 1 deletions
diff --git a/pkgs/development/compilers/arachne-pnr/default.nix b/pkgs/development/compilers/arachne-pnr/default.nix
index 0a0f8bbf0824..17f068c1c6f4 100644
--- a/pkgs/development/compilers/arachne-pnr/default.nix
+++ b/pkgs/development/compilers/arachne-pnr/default.nix
@@ -11,8 +11,9 @@ stdenv.mkDerivation rec {
     sha256 = "1wszcx6hgw4q4r778zswrlwdwvwxq834bkajck8w9yfqwxs9lmq8";
   };
 
+  enableParallelBuilding = true;
   makeFlags =
-    [ "DESTDIR=$(out)" "ICEBOX=${icestorm}/share/icebox"
+    [ "PREFIX=$(out)" "ICEBOX=${icestorm}/share/icebox"
     ];
 
   meta = {