diff --git a/repos/gems/recipes/raw/download_coreplus/content.mk b/repos/gems/recipes/raw/download_coreplus/content.mk
index a2c1295614..e4649a595f 100644
--- a/repos/gems/recipes/raw/download_coreplus/content.mk
+++ b/repos/gems/recipes/raw/download_coreplus/content.mk
@@ -3,6 +3,8 @@ content: init.config assets.tar
 init.config:
 	cp $(REP_DIR)/recipes/raw/download_coreplus/$@ $@
 
+TAR_OPT := --owner=0 --group=0 --numeric-owner --mode='go=' --mtime='2018-05-29 00:00Z'
+
 assets.tar:
-	tar --mtime='2018-05-29 00:00Z' -cf $@ -C $(REP_DIR)/recipes/raw/download_coreplus machine.vbox
-	tar --mtime='2018-05-29 00:00Z' -rf $@ -C $(REP_DIR)/recipes/raw/download_coreplus disk0.vmdk
+	tar $(TAR_OPT) -cf $@ -C $(REP_DIR)/recipes/raw/download_coreplus machine.vbox
+	tar $(TAR_OPT) -rf $@ -C $(REP_DIR)/recipes/raw/download_coreplus disk0.vmdk
diff --git a/repos/pc/recipes/raw/pc_wifi_firmware/content.mk b/repos/pc/recipes/raw/pc_wifi_firmware/content.mk
index b817696ade..4c44a5426c 100644
--- a/repos/pc/recipes/raw/pc_wifi_firmware/content.mk
+++ b/repos/pc/recipes/raw/pc_wifi_firmware/content.mk
@@ -20,5 +20,6 @@ LICENSE.wifi_drv:
 
 pc_wifi_firmware.tar: ucode_files LICENSE.wifi_drv
 	tar --mtime='2023-05-03 00:00Z' --remove-files \
+	    --owner=0 --group=0 --numeric-owner --mode='go=' \
 	    -cf $@ -C . *.* rtlwifi/*.* && \
 	rmdir rtlwifi