diff --git a/pkgs/build-support/trivial-builders.nix b/pkgs/build-support/trivial-builders.nix
index 9203425b20ae..1350e36940b3 100644
--- a/pkgs/build-support/trivial-builders.nix
+++ b/pkgs/build-support/trivial-builders.nix
@@ -153,4 +153,10 @@ _EOF_
         exec ${bin} "$@"
       '';
 
+  # Copy a path to the Nix store.
+  copyPathToStore = builtins.filterSource (p: t: true);
+
+  # Copy a list of paths to the Nix store.
+  copyPathsToStore = builtins.map copyPathToStore;
+
 }