diff --git a/pkgs/applications/science/biology/ants/default.nix b/pkgs/applications/science/biology/ants/default.nix
index fabcfbd708dd..fea8bdeef15e 100644
--- a/pkgs/applications/science/biology/ants/default.nix
+++ b/pkgs/applications/science/biology/ants/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   postInstall = ''
     for file in $out/bin/*; do
-      wrapProgram $file --set PATH "$out/bin"
+      wrapProgram $file --prefix PATH : "$out/bin"
     done
   '';