Add sas private build flag

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/elara/users/nikara/configs/console/git/default.nix

@@ -86,11 +86,15 @@ in
           };
         };
 
-        userKnownHostsFiles = with selfPkgs; [
-          ssh-known-hosts-github
-          ssh-known-hosts-sas-gitlab
-          ssh-known-hosts-sas-gerrit
-        ];
+        userKnownHostsFiles =
+          with selfPkgs;
+          (
+            [ ssh-known-hosts-github ]
+            ++ lib.lists.optionals config.sas.build.private [
+              ssh-known-hosts-sas-gitlab
+              ssh-known-hosts-sas-gerrit
+            ]
+          );
       };
     };
   };