diff --git a/common.mk b/common.mk
index 77879d8..3412287 100644
--- a/common.mk
+++ b/common.mk
@@ -266,13 +266,13 @@
 RMDIR ?= rmdir
 ECHO = /bin/echo -e
 
-ifeq ($(lastword $(subst /, ,$(CC))),clang)
+ifeq ($(filter clang,$(subst -, ,$(notdir $(CC)))),clang)
 CDRIVER = clang
 else
 CDRIVER = gcc
 endif
 
-ifeq ($(lastword $(subst /, ,$(CXX))),clang++)
+ifeq ($(filter clang++,$(subst -, ,$(notdir $(CXX)))),clang++)
 CXXDRIVER = clang
 else
 CXXDRIVER = gcc