1 files changed, 11 insertions, 0 deletions
diff --git a/4lib/krebs/listset.nix b/4lib/krebs/listset.nix
new file mode 100644
index 000000000..3aae22f20
--- /dev/null
+++ b/4lib/krebs/listset.nix
@@ -0,0 +1,11 @@
+{ lib, ... }:
+
+with lib;
+
+rec {
+  # listset k v = set k [v]
+
+  # insert : k -> v -> listset k v -> listset k v
+  insert = name: value: set:
+    set // { ${name} = set.${name} or [] ++ [value]; };
+}