diff --git a/pkgs/build-support/appimage/default.nix b/pkgs/build-support/appimage/default.nix
index 3afff79eaa23..7b9bb239402b 100644
--- a/pkgs/build-support/appimage/default.nix
+++ b/pkgs/build-support/appimage/default.nix
@@ -26,10 +26,11 @@ rec {
     ];
   };
 
-  extract = args@{ name ? "${args.pname}-${args.version}", src, ... }: pkgs.runCommand "${name}-extracted" {
+  extract = args@{ name ? "${args.pname}-${args.version}", postExtract ? "", src, ... }: pkgs.runCommand "${name}-extracted" {
       buildInputs = [ appimage-exec ];
     } ''
       appimage-exec.sh -x $out ${src}
+      ${postExtract}
     '';
 
   # for compatibility, deprecated