adjusted the build.pkg file to copy files into the container and only modify the packages directory

build.pkg

@@ -1,8 +1,16 @@
 #!/bin/bash
 set -eu -o pipefail
 podmanrun() {
-    podman run --pull=newer --rm -t -e VAULT_ADDR=http://vault.home.internal --secret=VAULT_TOKEN,type=env --userns keep-id:uid=1000,gid=1000 -v .:/src/build -w /src/build "$1" "/src/build/build_$2.sh"
+    mkdir -p packages
+    podman run --pull=newer --rm \
+        -e VAULT_ADDR=http://vault.home.internal --secret=VAULT_TOKEN,type=env \
+        --userns keep-id:uid=1000,gid=1000 \
+        -v .:/src/build:O \
+        -v ./packages:/src/build/packages \
+        -w /src/build \
+        "$1" "/src/build/build_$2.sh"
 }
 
 podmanrun "gitea.sebastian-tobie.de/docker/debian:bookworm" "debian"
 podmanrun "gitea.sebastian-tobie.de/docker/archlinux" "archlinux"
+podmanrun "gitea.sebastian-tobie.de/docker/ubi:9" "ubi"