disko: get rid of impure imports

This is a backwards-incompatible change but it allows to pin nixpkgs,
which is desirable especially in professional environments where
reproduciblity is important.

1 files changed, 4 insertions, 2 deletions

diff --git a/default.nix b/default.nix
index 6d08b8d..6858c40 100644
--- a/default.nix
+++ b/default.nix
@@ -1,3 +1,5 @@
-{
-  inherit (import ./lib) config create mount;
+{ lib ? (import <nixpkgs> {}).lib }: {
+  inherit (import ./lib {
+    inherit lib;
+  }) config create mount;
 }