diff --git a/mk/flags.mk b/mk/flags.mk
index 0b90061..d39f1f7 100644
--- a/mk/flags.mk
+++ b/mk/flags.mk
@@ -4,7 +4,7 @@
 SHARED = -shared
 
 ifeq ($(UNIX),1)
-L_CFLAGS += -DUSE_X11 -DUNIX
+L_CFLAGS += -DUSE_X11
 L_OBJS += src/backend/x11.o
 L_LIBS += -lm -lX11 -lXrender -lXcursor
 
diff --git a/mk/platform.mk b/mk/platform.mk
index 3bb4900..c8761f3 100644
--- a/mk/platform.mk
+++ b/mk/platform.mk
@@ -34,7 +34,6 @@ FOUND_PLATFORM = 1
 endif
 
 ifeq ($(TARGET),SunOS)
-CC = gcc
 UNIX = 1
 L_LIBS += -lsocket -lnsl
 OPENGL = 1
@@ -42,7 +41,6 @@ FOUND_PLATFORM = 1
 endif
 
 ifeq ($(TARGET),Darwin)
-CC = gcc
 DARWIN = 1
 L_LIBS += -framework Carbon
 FOUND_PLATFORM = 1