Execute partition script using shebang

scripts/Common/OS/setup.fish

@@ -8,6 +8,7 @@ function runSetup
     set -l projectName (basename "$projectRoot")
     set -l PROJECT_CLONE_ROOT "/opt/$(basename "$projectName")"
     set -l script (mktemp)
+    chmod +x "$script"
 
     if not type -q runChroot
         function runChroot -S
@@ -44,7 +45,8 @@ function runSetup
     end
 
     getConfig valhalla.partition.script > "$script"
-    bash "$script"
+    and "$script"
+    and rm "$script"
 
     # Copy `nixpkgs` channel
     and begin