diff --git a/pkgs/os-specific/windows/mcfgthreads/default.nix b/pkgs/os-specific/windows/mcfgthreads/default.nix
index 122848a4e6ca..45c80ab89796 100644
--- a/pkgs/os-specific/windows/mcfgthreads/default.nix
+++ b/pkgs/os-specific/windows/mcfgthreads/default.nix
@@ -7,8 +7,8 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "lhmouse";
     repo = "mcfgthread";
-    rev = "9570e5ca7b98002d707c502c919d951bf256b9c6";
-    sha256 = "10y2x3x601a7c1hkd6zlr3xpfsnlr05xl28v23clf619756a5755";
+    rev = "c446cf4fcdc262fc899a188a4bb7136284c34222";
+    sha256 = "1ib90lrd4dz8irq4yvzwhxqa86i5vxl2q2z3z04sf1i8hw427p2f";
   };
 
   outputs = [ "out" "dev" ];
@@ -18,10 +18,6 @@ stdenv.mkDerivation {
     rm -r "$sourceRoot/debug" "$sourceRoot/release"
   '';
 
-  postPatch = ''
-    substituteInPlace Makefile.am --replace '-Werror' ""
-  '';
-
   nativeBuildInputs = [
     autoreconfHook
   ];
diff --git a/pkgs/tools/compression/zstd/default.nix b/pkgs/tools/compression/zstd/default.nix
index e1437e3843db..2da5a725e71c 100644
--- a/pkgs/tools/compression/zstd/default.nix
+++ b/pkgs/tools/compression/zstd/default.nix
@@ -22,9 +22,7 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./playtests-darwin.patch
-  ] # This I didn't upstream because if you use posix threads with MinGW it will
-    # work fine, and I'm not sure how to write the condition.
-    ++ lib.optional stdenv.hostPlatform.isWindows ./mcfgthreads-no-pthread.patch;
+  ];
 
   postPatch = lib.optionalString (!static) ''
     substituteInPlace build/cmake/CMakeLists.txt \
diff --git a/pkgs/tools/compression/zstd/mcfgthreads-no-pthread.patch b/pkgs/tools/compression/zstd/mcfgthreads-no-pthread.patch
deleted file mode 100644
index 69921c0c7bad..000000000000
--- a/pkgs/tools/compression/zstd/mcfgthreads-no-pthread.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/programs/Makefile b/programs/Makefile
-index 7882fe8c..1e8237bb 100644
---- a/programs/Makefile
-+++ b/programs/Makefile
-@@ -107,7 +107,7 @@ HAVE_THREAD := $(shell [ "$(HAVE_PTHREAD)" -eq "1" -o -n "$(filter Windows%,$(OS
- ifeq ($(HAVE_THREAD), 1)
- THREAD_MSG := ==> building with threading support
- THREAD_CPP := -DZSTD_MULTITHREAD
--THREAD_LD := -pthread
-+THREAD_LD :=
- else
- THREAD_MSG := $(NO_THREAD_MSG)
- endif