epm repack k3s.sh: fix unitdir (for systemd services)

repack.d/k3s.sh

@@ -18,8 +18,11 @@ subst '1iConflicts: kubernetes-client' $SPEC
 
 # Check https://get.k3s.io/
 
-mkdir -p usr/lib/systemd/system/
-cat >usr/lib/systemd/system/k3s.service << EOF
+UNITDIR=/lib/systemd/system/
+[ -d "$UNITDIR" ] || UNITDIR=/usr/lib/systemd/system/
+
+mkdir -p .$UNITDIR
+cat >.$UNITDIR/k3s.service << EOF
 [Unit]
 Description=Lightweight Kubernetes
 Documentation=https://k3s.io
@@ -51,7 +54,7 @@ ExecStart=/usr/bin/k3s server
 
 EOF
 
-pack_file /usr/lib/systemd/system/k3s.service
+pack_file $UNITDIR/k3s.service
 
 mkdir -p etc/systemd/system/
 cat >etc/systemd/system/k3s.service.env << EOF