diff --git a/build-pkg/action.yml b/build-pkg/action.yml
index 890781b..e72e48e 100644
--- a/build-pkg/action.yml
+++ b/build-pkg/action.yml
@@ -20,6 +20,13 @@ runs:
       name: Install build tools
       run: |
         echo "##[group]Installing dependencies"
+        curl https://git.cgj.es/api/packages/archpkgs/arch/repository.key | pacman-key --add -
+        pacman-key --lsign-key 'archpkgs@noreply.git.cgj.es'
+        cat >> /etc/pacman.conf <<EOF
+        [archpkgs.git.cgj.es]
+        SigLevel = Required
+        Server = https://git.cgj.es/api/packages/archpkgs/arch/pkgs/$arch
+        EOF
         pacman -Sy --noconfirm --noprogressbar git sudo nodejs ${{ inputs.extra_pkgs }}
         echo "##[endgroup]"
         useradd --create-home --shell=/bin/false builder && usermod --lock builder