diff --git a/nixos/modules/services/cluster/hadoop/default.nix b/nixos/modules/services/cluster/hadoop/default.nix
index a1a95fe31ca..0adedaf1906 100644
--- a/nixos/modules/services/cluster/hadoop/default.nix
+++ b/nixos/modules/services/cluster/hadoop/default.nix
@@ -169,6 +169,7 @@ with lib;
         etc."hadoop-conf".source = let
           hadoopConf = "${import ./conf.nix { inherit cfg pkgs lib; }}/";
         in "${hadoopConf}";
+        variables.HADOOP_CONF_DIR = "/etc/hadoop-conf/";
       };
     })