diff --git a/modules/misc/debug.nix b/modules/misc/debug.nix
index fc0d8946a..908b91148 100644
--- a/modules/misc/debug.nix
+++ b/modules/misc/debug.nix
@@ -18,9 +18,8 @@ with lib;
   config = mkIf config.home.enableDebugInfo {
     home.extraOutputsToInstall = [ "debug" ];
 
-    home.sessionVariables = {
-      NIX_DEBUG_INFO_DIRS =
-        "$NIX_DEBUG_INFO_DIRS\${NIX_DEBUG_INFO_DIRS:+:}${config.home.profileDirectory}/lib/debug";
+    home.sessionSearchVariables = {
+      NIX_DEBUG_INFO_DIRS = [ "${config.home.profileDirectory}/lib/debug" ];
     };
   };
 }