diff --git a/pkgs/development/libraries/mpich/default.nix b/pkgs/development/libraries/mpich/default.nix
index 05094b2f9839..87d24854255a 100644
--- a/pkgs/development/libraries/mpich/default.nix
+++ b/pkgs/development/libraries/mpich/default.nix
@@ -49,6 +49,6 @@ stdenv.mkDerivation  rec {
       fullName = "MPICH license (permissive)";
     };
     maintainers = [ maintainers.markuskowa ];
-    platforms = platforms.unix;
+    platforms = platforms.linux;
   };
 }