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-rw-r--r--lib/filesystem.nix4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/filesystem.nix b/lib/filesystem.nix
index 37b60e4fe11e0..4860d4d02a773 100644
--- a/lib/filesystem.nix
+++ b/lib/filesystem.nix
@@ -1,6 +1,8 @@
-# Functions for copying sources to the Nix store.
+# Functions for querying information about the filesystem
+# without copying any files to the Nix store.
 { lib }:
 
+# Tested in lib/tests/filesystem.sh
 let
   inherit (builtins)
     readDir