diff --git a/common.nix b/common.nix
index 4e906db..d4d26de 100644
--- a/common.nix
+++ b/common.nix
@@ -83,6 +83,7 @@
     isync
     mu
     msmtp
+    vdirsyncer khard khal
 
     veriT
     minisat
@@ -127,6 +128,9 @@
       extraPythonPackages = [ pkgs.pythonPackages.websocket_client ];
     };
 
+    # remove with khal 0.9.0
+    khal = khal.overrideDerivation (oldAttrs: { checkPhase = ""; installCheckPhase = "true"; });
+
     stable = stable;
   };