diff --git a/overlays/khal.nix b/overlays/khal.nix
new file mode 100644
index 00000000..dcc1beb7
--- /dev/null
+++ b/overlays/khal.nix
@@ -0,0 +1,12 @@
+final: prev: {
+  khal = prev.khal.overrideAttrs (old: {
+    src = prev.fetchFromGitHub {
+      rev = "a270656b4754329a0e76e72a473307548c18afb8";
+      owner = "pimutils";
+      repo = "khal";
+      hash = "sha256-LwwaCGl4NFG4dJuvr75ZfFZMX2ivwLg1Z8eQcjaLtwI=";
+    };
+    SETUPTOOLS_SCM_PRETEND_VERSION = "unstable-2022-06-14";
+    doInstallCheck = false;
+  });
+}