diff --git a/pkgs/development/interpreters/python/pypy/default.nix b/pkgs/development/interpreters/python/pypy/default.nix
index 3004ebc1f751..b2b7d0baa53e 100644
--- a/pkgs/development/interpreters/python/pypy/default.nix
+++ b/pkgs/development/interpreters/python/pypy/default.nix
@@ -156,7 +156,7 @@ in with passthru; stdenv.mkDerivation rec {
     ln -s $out/${executable}-c/lib-python/${if isPy3k then "3" else pythonVersion} $out/lib/${libPrefix}
 
     ${lib.optionalString stdenv.isDarwin ''
-      install_name_tool -change @rpath/libpypy${optionalString isPy3k "3"}-c.dylib $out/lib/libpypy${optionalString isPy3k "3"}-c.dylib $out/bin/${executable}
+      install_name_tool -change @rpath/lib${executable}-c.dylib $out/lib/lib${executable}-c.dylib $out/bin/${executable}
     ''}
 
     # verify cffi modules
diff --git a/pkgs/development/interpreters/python/pypy/prebuilt_2_7.nix b/pkgs/development/interpreters/python/pypy/prebuilt_2_7.nix
index babaf3fd0a47..444d43309511 100644
--- a/pkgs/development/interpreters/python/pypy/prebuilt_2_7.nix
+++ b/pkgs/development/interpreters/python/pypy/prebuilt_2_7.nix
@@ -105,8 +105,8 @@ in with passthru; stdenv.mkDerivation {
   '' + lib.optionalString (stdenv.isDarwin) ''
     install_name_tool \
       -change \
-        @rpath/libpypy${optionalString isPy3k "3"}-c.dylib \
-        $out/lib/libpypy${optionalString isPy3k "3"}-c.dylib \
+        @rpath/lib${executable}-c.dylib \
+        $out/lib/lib${executable}-c.dylib \
         $out/bin/${executable}
   '';