diff --git a/lib/sources.nix b/lib/sources.nix
index d990777c6fcc..8b7cd5c84f62 100644
--- a/lib/sources.nix
+++ b/lib/sources.nix
@@ -5,22 +5,16 @@
 let
   inherit (builtins)
     match
-    readDir
     split
     storeDir
-    tryEval
     ;
   inherit (lib)
     boolToString
     filter
-    getAttr
     isString
-    pathExists
     readFile
     ;
   inherit (lib.filesystem)
-    pathType
-    pathIsDirectory
     pathIsRegularFile
     ;