handle pages and posts not existing

pkgs-lib.nix

@@ -94,6 +94,8 @@ in {
           postsRendered = let
             path = "${toString src}/posts";
           in
+            if l.pathExists postsRendered
+            then
               l.pipe (l.readDir path) [
                 (l.mapAttrsToList (
                   name: _: let
@@ -124,10 +126,13 @@ in {
                     then true
                     else !(d 0 > od 0 && d 1 > od 1 && d 2 > od 2)
                 ))
-            ];
+              ]
+            else [];
           pagesRendered = let
             path = "${toString src}/pages";
           in
+            if l.pathExists path
+            then
               l.mapAttrsToList
               (
                 name: _: rec {
@@ -136,7 +141,8 @@ in {
                   content = l.readFile (parseMarkdown id (getPath path name));
                 }
               )
-            (l.readDir path);
+              (l.readDir path)
+            else [];
           baseurl =
             if local
             then "http://localhost:8080"