diff --git a/methods.py b/methods.py
index 050e56be2cb..2e71d7b8b92 100644
--- a/methods.py
+++ b/methods.py
@@ -665,7 +665,11 @@ def is_apple_clang(env):
     if not using_clang(env):
         return False
     try:
-        version = subprocess.check_output(shlex.split(env.subst(env["CXX"])) + ["--version"]).strip().decode("utf-8")
+        version = (
+            subprocess.check_output(shlex.split(env.subst(env["CXX"]), posix=False) + ["--version"])
+            .strip()
+            .decode("utf-8")
+        )
     except (subprocess.CalledProcessError, OSError):
         print_warning("Couldn't parse CXX environment variable to infer compiler version.")
         return False
@@ -737,7 +741,7 @@ def get_compiler_version(env):
     # Clang used to return hardcoded 4.2.1: # https://reviews.llvm.org/D56803
     try:
         version = subprocess.check_output(
-            shlex.split(env.subst(env["CXX"])) + ["--version"], shell=(os.name == "nt"), encoding="utf-8"
+            shlex.split(env.subst(env["CXX"]), posix=False) + ["--version"], shell=(os.name == "nt"), encoding="utf-8"
         ).strip()
     except (subprocess.CalledProcessError, OSError):
         print_warning("Couldn't parse CXX environment variable to infer compiler version.")