diff --git a/lib.nix b/lib.nix
index 7f3ffa9..42b284d 100644
--- a/lib.nix
+++ b/lib.nix
@@ -11,17 +11,17 @@ in
       modules ? [ ],
     }:
     let
-      merged_config = lib.foldl' (acc: elem: acc // elem.config) config modules;
-      checks = lib.concatStringsSep "\n" (
-        lib.concatMap (
-          attrs:
-          lib.mapAttrsToList (k: v: ''
-            echo "Running ${k}"
-            ${v}/bin/check
-            echo "Passed ${k}"
-          '') attrs.checks
-        ) modules
-      );
+      merged_config = lib.foldl' (acc: elem: lib.recursiveUpdate acc elem) config modules;
+      # checks = lib.concatStringsSep "\n" (
+      #   lib.concatMap (
+      #     attrs:
+      #     lib.mapAttrsToList (k: v: ''
+      #       echo "Running ${k}"
+      #       ${v}/bin/check
+      #       echo "Passed ${k}"
+      #     '') attrs.checks
+      #   ) modules
+      # );
       removeNullAndEmptyAttrs =
         attrs:
         let
@@ -48,15 +48,18 @@ in
         )
       );
     in
-    pkgs.writeShellApplication {
-      inherit name;
-      text =
-        checks
-        + ''
-          PC_CONFIG_FILES=${configFile} ${pkgs.process-compose}/bin/process-compose "$@"
-
-        '';
+    {
+      inherit configFile merged_config;
     };
+  # pkgs.writeShellApplication {
+  #   inherit name;
+  #   text =
+  #     checks
+  #     + ''
+  #       PC_CONFIG_FILES=${configFile} ${pkgs.process-compose}/bin/process-compose "$@"
+  #
+  #     '';
+  # };
   mkPostgres =
     {
       name,
@@ -64,6 +67,7 @@ in
       config ? { },
       extra_config ? '''',
       package ? pkgs.postgresql,
+      data_dir ? ".data/",
       ...
     }:
     let
@@ -92,23 +96,22 @@ in
           "'${lib.replaceStrings [ "'" ] [ "''" ] value}'"
         else
           builtins.toString value;
-      configFile = pkgs.writeTextDir "postgresql.conf" (
-        lib.concatStringsSep "\n" (
+      configFile = pkgs.writeTextFile {
+        name = "postgresql.conf";
+        text = lib.concatStringsSep "\n" (
           lib.mapAttrsToList (n: v: "${n} = ${toStr v}") (
             lib.filterAttrs (lib.const (x: x != null)) merged_config
           )
-        )
-      );
-      configFileCheck = pkgs.writeShellApplication {
-        name = "check";
-        text = ''
-          ${package}/bin/postgres -D${configFile} -C config_file
-        '';
+        );
       };
     in
+    # configFileCheck = pkgs.runCommand {} ''
+    #     ${package}/bin/postgres -D${configFile} -C config_file
+    #     touch $out
+    #   '';
     {
-      config.processes."${name}" = {
+      processes."${name}" = {
+        command = "${package}/bin/postgresql -D ${data_dir} --config-file ${configFile}";
       };
-      checks."postgresql${name}" = configFileCheck;
     };
 }