diff --git a/flake.nix b/flake.nix
index e1c2de5..ccbafc2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -434,7 +434,7 @@
           name = "python-asyncserial";
           version = artiqpkgs.packages.x86_64-linux.asyncserial.version;
           src = artiqpkgs.packages.x86_64-linux.asyncserial.src;
-          depends = [ "mingw-w64-clang-x86_64-python" ];
+          depends = [ "mingw-w64-clang-x86_64-python" "mingw-w64-clang-x86_64-python-pyserial" ];
         };
         msys2-korad_ka3005p = msys2.makeMsys2Package {
           name = "korad_ka3005p";