diff --git a/app-i18n/mozc/mozc-2.26.4220_p20201212102434_p20201219202429.ebuild b/app-i18n/mozc/mozc-2.26.4220_p20201212102434_p20201219202429.ebuild
index 8ac56d51c502f..7d999af9f7b8d 100644
--- a/app-i18n/mozc/mozc-2.26.4220_p20201212102434_p20201219202429.ebuild
+++ b/app-i18n/mozc/mozc-2.26.4220_p20201212102434_p20201219202429.ebuild
@@ -159,7 +159,7 @@ src_prepare() {
 	sed \
 		-e "s/def GypMain(options, unused_args):/def GypMain(options, gyp_args):/" \
 		-e "s/RunOrDie(gyp_command + gyp_options)/RunOrDie(gyp_command + gyp_options + gyp_args)/" \
-		-e "s/RunOrDie(\[ninja/&, '-j$(makeopts_jobs)', '-l$(makeopts_loadavg "${MAKEOPTS}" 0)', '-v'/" \
+		-e "s/RunOrDie(\[ninja/&, '-j$(makeopts_jobs "${MAKEOPTS}" 999)', '-l$(makeopts_loadavg "${MAKEOPTS}" 0)', '-v'/" \
 		-i build_mozc.py || die
 
 	local ar=($(tc-getAR))
diff --git a/app-i18n/mozc/mozc-9999.ebuild b/app-i18n/mozc/mozc-9999.ebuild
index 911bfa462a43b..31dff85e7c27e 100644
--- a/app-i18n/mozc/mozc-9999.ebuild
+++ b/app-i18n/mozc/mozc-9999.ebuild
@@ -159,7 +159,7 @@ src_prepare() {
 	sed \
 		-e "s/def GypMain(options, unused_args):/def GypMain(options, gyp_args):/" \
 		-e "s/RunOrDie(gyp_command + gyp_options)/RunOrDie(gyp_command + gyp_options + gyp_args)/" \
-		-e "s/RunOrDie(\[ninja/&, '-j$(makeopts_jobs)', '-l$(makeopts_loadavg "${MAKEOPTS}" 0)', '-v'/" \
+		-e "s/RunOrDie(\[ninja/&, '-j$(makeopts_jobs "${MAKEOPTS}" 999)', '-l$(makeopts_loadavg "${MAKEOPTS}" 0)', '-v'/" \
 		-i build_mozc.py || die
 
 	local ar=($(tc-getAR))