diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index 538aee58fe..623881c93f 100644
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -182,7 +182,9 @@ $(eval $(call SetupHostCommand,rsync,Please install 'rsync', \
 	rsync --version </dev/null))
 
 $(eval $(call SetupHostCommand,which,Please install 'which', \
-	which which | grep which))
+	/usr/bin/which which, \
+	/bin/which which, \
+	which which))
 
 $(STAGING_DIR_HOST)/bin/mkhash: $(SCRIPT_DIR)/mkhash.c
 	mkdir -p $(dir $@)