--- argon2_cffi-18.3.0/setup.py.orig	2018-08-19 07:46:22.000000000 -0400
+++ argon2_cffi-18.3.0/setup.py	2019-01-02 06:45:23.449755000 -0500
@@ -43,7 +43,8 @@ sources = [
 
 # Add vendored integer types headers if necessary.
 windows = "win32" in str(sys.platform).lower()
-if windows:
+is_mingw = ('GCC' in sys.version)
+if windows and (not is_mingw):
     int_base = "extras/msinttypes/"
     inttypes = int_base + "inttypes"
     stdint = int_base + "stdint"
@@ -318,14 +319,24 @@ class BuildCLibWithCompilerFlags(build_c
             # files in a temporary build directory.)
             macros = build_info.get("macros")
             include_dirs = build_info.get("include_dirs")
-            objects = self.compiler.compile(
-                sources,
-                extra_preargs=["-msse2"] if optimized and not windows else [],
-                output_dir=self.build_temp,
-                macros=macros,
-                include_dirs=include_dirs,
-                debug=self.debug,
-            )
+            if is_mingw:
+                objects = self.compiler.compile(
+                    sources,
+                    extra_preargs=["-msse2"] if optimized else [],
+                    output_dir=self.build_temp,
+                    macros=macros,
+                    include_dirs=include_dirs,
+                    debug=self.debug,
+                )
+            else:
+                objects = self.compiler.compile(
+                    sources,
+                    extra_preargs=["-msse2"] if optimized and not windows else [],
+                    output_dir=self.build_temp,
+                    macros=macros,
+                    include_dirs=include_dirs,
+                    debug=self.debug,
+                )
 
             # Now "link" the object files together into a static library.
             # (On Unix at least, this isn't really linking -- it just
--- argon2_cffi-18.3.0/src/argon2/_ffi_build.py.orig	2018-12-30 08:01:56.914788500 -0500
+++ argon2_cffi-18.3.0/src/argon2/_ffi_build.py	2018-12-30 08:04:48.966634200 -0500
@@ -12,7 +12,7 @@ if use_system_argon2:
     include_dirs = []
 
 # Add vendored integer types headers.
-if "win32" in str(sys.platform).lower():
+if ("win32" in str(sys.platform).lower()) and (not 'GCC' in sys.version):
     int_base = os.path.join("extras", "msinttypes")
     inttypes = os.path.join(int_base, "inttypes")
     stdint = os.path.join(int_base, "stdint")