diff --git a/pkgs/development/compilers/llvm/12/llvm/default.nix b/pkgs/development/compilers/llvm/12/llvm/default.nix
index 30a1a7a16df..4f9435d1819 100644
--- a/pkgs/development/compilers/llvm/12/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/12/llvm/default.nix
@@ -15,10 +15,11 @@
 , buildLlvmTools
 , debugVersion ? false
 , enableManpages ? false
-, enableSharedLibraries ? !stdenv.hostPlatform.isStatic
+, enableSharedLibraries ? (!stdenv.hostPlatform.isStatic && !stdenv.targetPlatform.isMinGW)
 , enablePFM ? !(stdenv.isDarwin
   || stdenv.isAarch64 # broken for Ampere eMAG 8180 (c2.large.arm on Packet) #56245
   || stdenv.isAarch32 # broken for the armv7l builder
+  || stdenv.targetPlatform.isMinGW
 )
 , enablePolly ? false
 }:
@@ -120,7 +121,7 @@ in stdenv.mkDerivation (rec {
     "-DLLVM_INSTALL_CMAKE_DIR=${placeholder "dev"}/lib/cmake/llvm/"
     "-DCMAKE_BUILD_TYPE=${if debugVersion then "Debug" else "Release"}"
     "-DLLVM_INSTALL_UTILS=ON"  # Needed by rustc
-    "-DLLVM_BUILD_TESTS=ON"
+    "-DLLVM_BUILD_TESTS=${if stdenv.targetPlatform.isMinGW then "OFF" else "ON"}"
     "-DLLVM_ENABLE_FFI=ON"
     "-DLLVM_ENABLE_RTTI=ON"
     "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
@@ -134,7 +135,7 @@ in stdenv.mkDerivation (rec {
     "-DSPHINX_OUTPUT_MAN=ON"
     "-DSPHINX_OUTPUT_HTML=OFF"
     "-DSPHINX_WARNINGS_AS_ERRORS=OFF"
-  ] ++ optionals (!isDarwin) [
+  ] ++ optionals (!isDarwin && !stdenv.targetPlatform.isMinGW) [
     "-DLLVM_BINUTILS_INCDIR=${libbfd.dev}/include"
   ] ++ optionals isDarwin [
     "-DLLVM_ENABLE_LIBCXX=ON"