diff --git a/hosts/by-name/moby/kernel.nix b/hosts/by-name/moby/kernel.nix
index ac2e8d947..6cd0014cd 100644
--- a/hosts/by-name/moby/kernel.nix
+++ b/hosts/by-name/moby/kernel.nix
@@ -74,6 +74,7 @@ in
     # without this some GUI apps fail: `DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory`
     # this is because they can't allocate enough video ram.
     # see related nixpkgs issue: <https://github.com/NixOS/nixpkgs/issues/260222>
+    # TODO(2023/12/03): remove once mesa 23.3.1 lands: <https://github.com/NixOS/nixpkgs/pull/265740>
     #
     # the default CMA seems to be 32M.
     # i was running fine with 256MB from 2022/07-ish through 2022/12-ish, but then the phone quit reliably coming back from sleep (phosh): maybe a memory leak?
diff --git a/hosts/common/programs/mpv.nix b/hosts/common/programs/mpv.nix
index d7576063b..96eb2337d 100644
--- a/hosts/common/programs/mpv.nix
+++ b/hosts/common/programs/mpv.nix
@@ -30,8 +30,11 @@ in
         # 2023/08/29: fixes an error where mpv on moby launches with the message
         #   "DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory"
         #   audio still works, and controls, screenshotting, etc -- just not the actual rendering
-        # this is likely a regression for mpv 0.36.0.
-        # the actual error message *appears* to come from the mesa library, but it's tough to trace.
+        #
+        #   this is likely a regression for mpv 0.36.0.
+        #   the actual error message *appears* to come from the mesa library, but it's tough to trace.
+        #
+        #   TODO(2023/12/03): remove once mesa 23.3.1 lands: <https://github.com/NixOS/nixpkgs/pull/265740>
         #
         # backend compatibility (2023/10/22):
         # run with `--vo=help` to see a list of all output options.