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-rw-r--r--pkgs/by-name/pe/petsc/package.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/by-name/pe/petsc/package.nix b/pkgs/by-name/pe/petsc/package.nix
index 2ea48a54a7933..498a14c96dc38 100644
--- a/pkgs/by-name/pe/petsc/package.nix
+++ b/pkgs/by-name/pe/petsc/package.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     lapack
   ] ++ lib.optional hdf5-support hdf5 ++ lib.optional petsc-withp4est p4est ++ lib.optionals withParmetis [ metis parmetis ];
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace config/install.py \
       --replace /usr/bin/install_name_tool ${cctools}/bin/install_name_tool
   '';