diff --git a/pkgs/by-name/ex/exactaudiocopy/package.nix b/pkgs/by-name/ex/exactaudiocopy/package.nix
index d341a353994f..ad012b56dea6 100644
--- a/pkgs/by-name/ex/exactaudiocopy/package.nix
+++ b/pkgs/by-name/ex/exactaudiocopy/package.nix
@@ -21,8 +21,8 @@ let
   };
 
   cygwin = fetchurl {
-    url = "https://mirrors.kernel.org/sourceware/cygwin/x86_64/release/cygwin/cygwin-3.6.1-1-x86_64.tar.xz";
-    sha256 = "45d1c76a15426209c20a8d4df813e94fbd17bd5d85ad4d742515ff432400143e";
+    url = "https://mirrors.kernel.org/sourceware/cygwin/x86_64/release/cygwin/cygwin-3.6.6-1-x86_64.tar.xz";
+    hash = "sha256-xcgYjfVB9dF0twGC1ww7r4NCPHT/+aEk1CMmS7ndJuA=";
   };
 
   patched_eac = stdenv.mkDerivation {