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-rw-r--r--lib/kernel.nix7
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/kernel.nix b/lib/kernel.nix
index 14783ae9739..5923011774b 100644
--- a/lib/kernel.nix
+++ b/lib/kernel.nix
@@ -1,7 +1,12 @@
-{ lib }:
+{ lib, version }:
 
 with lib;
 rec {
+  # Common patterns/legacy
+  whenAtLeast = ver: mkIf (versionAtLeast version ver);
+  whenOlder   = ver: mkIf (versionOlder version ver);
+  # range is (inclusive, exclusive)
+  whenBetween = verLow: verHigh: mkIf (versionAtLeast version verLow && versionOlder version verHigh);
 
 
   # Keeping these around in case we decide to change this horrible implementation :)