diff --git a/.github/workflows/ami-release-nix.yml b/.github/workflows/ami-release-nix.yml
index d500af738..8802861e2 100644
--- a/.github/workflows/ami-release-nix.yml
+++ b/.github/workflows/ami-release-nix.yml
@@ -54,7 +54,7 @@ jobs:
         run: |
           packer init stage2-nix-psql.pkr.hcl
           GIT_SHA=${{github.sha}}
-          packer build -var "git-head-version=${GIT_SHA}" -var "packer-execution-id=${GITHUB_RUN_ID}" -var-file="development-arm.vars.pkr.hcl" -var-file="common-nix.vars.pkr.hcl" stage2-nix-psql.pkr.hcl
+          packer build -var "git_sha=${GIT_SHA}" -var "git-head-version=${GIT_SHA}" -var "packer-execution-id=${GITHUB_RUN_ID}" -var-file="development-arm.vars.pkr.hcl" -var-file="common-nix.vars.pkr.hcl" stage2-nix-psql.pkr.hcl
 
       - name: Grab release version
         id: process_release_version
diff --git a/common-nix.vars.pkr.hcl b/common-nix.vars.pkr.hcl
index 04eb9d52f..4346000d5 100644
--- a/common-nix.vars.pkr.hcl
+++ b/common-nix.vars.pkr.hcl
@@ -1 +1 @@
-postgres-version = "15.6.1.104"
+postgres-version = "15.6.1.104-groonga"