diff --git a/Makefile.inc1 b/Makefile.inc1
index ceb8d0b28073..f21f305db208 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -589,7 +589,12 @@ STRICTTMPPATH=	${XPATH}:${BPATH}:${UNIVERSE_TOOLCHAIN_PATH}
 # the build to break on other systems that don't have that tool. For now we
 # still allow using the old behaviour (inheriting $PATH) if
 # BUILD_WITH_STRICT_TMPPATH is set to 0 but this will eventually be removed.
+.if ${USING_SYSTEM_LINKER} != "no" || ${USING_SYSTEM_COMPILER} != "no"
+# strict $PATH does not work yet with USING_SYSTEM_LINKER/USING_SYSTEM_COMPILER
+BUILD_WITH_STRICT_TMPPATH?=0
+.else
 BUILD_WITH_STRICT_TMPPATH?=1
+.endif
 .if ${BUILD_WITH_STRICT_TMPPATH} != 0
 TMPPATH=	${STRICTTMPPATH}
 .else