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-rw-r--r--nixos/modules/services/misc/errbot.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/modules/services/misc/errbot.nix b/nixos/modules/services/misc/errbot.nix
index ac6ba2181de28..256adce2f02e1 100644
--- a/nixos/modules/services/misc/errbot.nix
+++ b/nixos/modules/services/misc/errbot.nix
@@ -81,7 +81,7 @@ in {
 
     systemd.services = mapAttrs' (name: instanceCfg: nameValuePair "errbot-${name}" (
     let
-      dataDir = if !isNull instanceCfg.dataDir then instanceCfg.dataDir else
+      dataDir = if instanceCfg.dataDir != null then instanceCfg.dataDir else
         "/var/lib/errbot/${name}";
     in {
       after = [ "network-online.target" ];