Index: Mk/bsd.port.mk
===================================================================
--- Mk/bsd.port.mk
+++ Mk/bsd.port.mk
@@ -1070,6 +1070,9 @@
 IGNORE=	CROSS_SYSROOT should be defined
 .endif
 .include "${LOCALBASE}/share/toolchains/${CROSS_TOOLCHAIN}.mk"
+# Do not override CC, etc for CMake.  A Toolchain file must be generated
+# instead.
+.if !(defined(USES) && ${USES:Mcmake*})
 # Do not define CPP on purpose
 .if !defined(HOSTCC)
 HOSTCC:=	${CC}
@@ -1093,6 +1096,7 @@
 STRIPBIN=	${STRIP_CMD}
 .export.env STRIPBIN
 .endif
+.endif
 
 #
 # DESTDIR section to start a chrooted process if invoked with DESTDIR set