diff --git a/driver/tool.cpp b/driver/tool.cpp
index beb2f6a9e5..f0a88af84c 100644
--- a/driver/tool.cpp
+++ b/driver/tool.cpp
@@ -78,24 +78,30 @@ std::string getProgram(const char *fallbackName,
 
 std::string getGcc(std::vector<std::string> &additional_args,
                    const char *fallback) {
-	// In case $CC contains spaces split it into a command and arguments
-	std::string cc = env::get("CC");
-	if (cc.empty())
-		return getProgram(fallback, &gcc);
+#ifdef _WIN32
+  // spaces in $CC are to be expected on Windows
+  // (e.g., `C:\Program Files\LLVM\bin\clang-cl.exe`)
+  return getProgram(fallback, &gcc, "CC");
+#else
+  // Posix: in case $CC contains spaces split it into a command and arguments
+  std::string cc = env::get("CC");
+  if (cc.empty())
+    return getProgram(fallback, &gcc);
 
-	// $CC is set so fallback doesn't matter anymore.
-	if (cc.find(' ') == cc.npos)
-		return getProgram(cc.c_str(), &gcc);
+  // $CC is set so fallback doesn't matter anymore.
+  if (cc.find(' ') == cc.npos)
+    return getProgram(cc.c_str(), &gcc);
 
-	llvm::StringRef sr(cc);
-	llvm::SmallVector<llvm::StringRef, 8> args;
-	sr.split(args, ' ', /*MaxSplit=*/-1, /*keepEmpty=*/false);
+  llvm::StringRef sr(cc);
+  llvm::SmallVector<llvm::StringRef, 8> args;
+  sr.split(args, ' ', /*MaxSplit=*/-1, /*keepEmpty=*/false);
 
-	// args[0] == CC command, args[1..] = CLI options
-	additional_args.reserve(additional_args.size() + args.size() - 1);
-	for (size_t i = 1; i < args.size(); i ++)
-		additional_args.emplace_back(args[i].str());
-	return getProgram(args[0].str().c_str(), &gcc);
+  // args[0] == CC command, args[1..] = CLI options
+  additional_args.reserve(additional_args.size() + args.size() - 1);
+  for (size_t i = 1; i < args.size(); i ++)
+    additional_args.emplace_back(args[i].str());
+  return getProgram(args[0].str().c_str(), &gcc);
+#endif
 }
 
 ////////////////////////////////////////////////////////////////////////////////