diff --git a/pkgs/os-specific/windows/mingw-w64/default.nix b/pkgs/os-specific/windows/mingw-w64/default.nix
index d490debcebb0f..684d4bd3efeeb 100644
--- a/pkgs/os-specific/windows/mingw-w64/default.nix
+++ b/pkgs/os-specific/windows/mingw-w64/default.nix
@@ -10,6 +10,7 @@
 assert lib.assertOneOf "crt" crt [
   "msvcrt"
   "ucrt"
+  "cygwin"
 ];
 
 stdenv.mkDerivation {