diff --git a/pkgs/by-name/fi/fira-sans/package.nix b/pkgs/by-name/fi/fira-sans/package.nix
index c7ef979a1716..163e81ef8258 100644
--- a/pkgs/by-name/fi/fira-sans/package.nix
+++ b/pkgs/by-name/fi/fira-sans/package.nix
@@ -21,6 +21,10 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     stripRoot = false;
   };
 
+  postInstall = ''
+    rm -r "__MACOSX"
+  '';
+
   nativeBuildInputs = [ installFonts ];
 
   meta = {