fix script

lib.nix

@@ -108,9 +108,14 @@ in
           )
         );
       };
-      setupScript = pkgs.writeShellScriptBin "setup-postgres" ''
-        set -euo pipefail
-        export PATH=${package}/bin:${pkgs.coreutils}/bin
+      setupScript = pkgs.writeShellApplication {
+        name = "setup-postgres";
+        runtimeInputs = [
+          package
+          pkgs.coreutils
+          pkgs.gnused
+        ];
+        text = ''
           POSTGRES_RUN_INITIAL_SCRIPT="false"
           if [[ ! -d "$PGDATA" ]]; then
             initdb --no-instructions
@@ -134,6 +139,7 @@ in
 
           unset POSTGRES_RUN_INITIAL_SCRIPT
         '';
+      };
 
       script = pkgs.writeShellApplication {
         name = "run-postgres";