1 files changed, 18 insertions, 0 deletions
diff --git a/nixos/modules/services/x11/display-managers/default.nix b/nixos/modules/services/x11/display-managers/default.nix
index 92b3af8527f..03fe68fe505 100644
--- a/nixos/modules/services/x11/display-managers/default.nix
+++ b/nixos/modules/services/x11/display-managers/default.nix
@@ -219,6 +219,24 @@ in
 
       session = mkOption {
         default = [];
+        type = with types; listOf (submodule ({ ... }: {
+          options = {
+            manage = mkOption {
+              description = "Whether this is a desktop or a window manager";
+              type = enum [ "desktop" "window" ];
+            };
+
+            name = mkOption {
+              description = "Name of this session";
+              type = str;
+            };
+
+            start = mkOption {
+              description = "Commands to run to start this session";
+              type = lines;
+            };
+          };
+        }));
         example = literalExpression
           ''
             [ { manage = "desktop";