diff --git a/alpine/APKBUILD.in b/alpine/APKBUILD.in
index fef7a61ccc89..8869a44b931e 100644
--- a/alpine/APKBUILD.in
+++ b/alpine/APKBUILD.in
@@ -33,6 +33,8 @@ _localstatedir=/var/run/frr
 _user=frr
 
 build() {
+	export ABUILD_APK_INDEX_OPTS="--allow-untrusted"
+
 	cd "$builddir"
 
 	./configure \
diff --git a/docker/alpine/libyang/APKBUILD b/docker/alpine/libyang/APKBUILD
index aa792e7f0b91..622b163f0da6 100755
--- a/docker/alpine/libyang/APKBUILD
+++ b/docker/alpine/libyang/APKBUILD
@@ -21,6 +21,7 @@ source="$pkgname-$pkgver.tar.gz::https://github.com/CESNET/libyang/archive/v$pkg
 #     - CVE-2021-28906
 
 build() {
+	export ABUILD_APK_INDEX_OPTS="--allow-untrusted"
 	if [ "$CBUILD" != "$CHOST" ]; then
 		CMAKE_CROSSOPTS="-DCMAKE_SYSTEM_NAME=Linux -DCMAKE_HOST_SYSTEM_NAME=Linux"
 	fi