diff --git a/pkgs/development/python-modules/patool/default.nix b/pkgs/development/python-modules/patool/default.nix
index 9d31fa9e93ee..d36400970391 100644
--- a/pkgs/development/python-modules/patool/default.nix
+++ b/pkgs/development/python-modules/patool/default.nix
@@ -1,7 +1,7 @@
 { lib
+, stdenv
 , buildPythonPackage
 , fetchFromGitHub
-, fetchpatch
 , pytestCheckHook
 , p7zip
 , cabextract
@@ -60,6 +60,8 @@ buildPythonPackage rec {
     "test_unzip_file"
     "test_zip"
     "test_zip_file"
+  ] ++ lib.optionals stdenv.isDarwin [
+    "test_ar"
   ];
 
   meta = with lib; {
diff --git a/pkgs/tools/archivers/zpaq/default.nix b/pkgs/tools/archivers/zpaq/default.nix
index 7c394e27d178..6a03b825e902 100644
--- a/pkgs/tools/archivers/zpaq/default.nix
+++ b/pkgs/tools/archivers/zpaq/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     homepage = "http://mattmahoney.net/dc/zpaq.html";
     license = licenses.gpl3Plus ;
     maintainers = with maintainers; [ raskin ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     mainProgram = "zpaq";
   };
 }