diff --git a/sdk_container/src/third_party/portage-stable/app-arch/unzip/unzip-6.0_p27.ebuild b/sdk_container/src/third_party/portage-stable/app-arch/unzip/unzip-6.0_p27-r1.ebuild
similarity index 99%
rename from sdk_container/src/third_party/portage-stable/app-arch/unzip/unzip-6.0_p27.ebuild
rename to sdk_container/src/third_party/portage-stable/app-arch/unzip/unzip-6.0_p27-r1.ebuild
index a0eef4ef04..c466394b30 100644
--- a/sdk_container/src/third_party/portage-stable/app-arch/unzip/unzip-6.0_p27.ebuild
+++ b/sdk_container/src/third_party/portage-stable/app-arch/unzip/unzip-6.0_p27-r1.ebuild
@@ -73,6 +73,8 @@ src_configure() {
 		*) die "Unknown target; please update the ebuild to handle ${CHOST}	" ;;
 	esac
 
+	append-flags -std=gnu89
+
 	[[ ${CHOST} == *linux* ]] && append-cppflags -DNO_LCHMOD
 	use bzip2 && append-cppflags -DUSE_BZIP2
 	use unicode && append-cppflags -DUNICODE_SUPPORT -DUNICODE_WCHAR -DUTF8_MAYBE_NATIVE -DUSE_ICONV_MAPPING