diff --git a/flake.nix b/flake.nix
index 1e3b5e5..2bc790b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -39,6 +39,7 @@
           ];
           src = solo1-cli-src;
 
+          # python-fido2 changed CTAP1 -> Ctap1 and CTAP2 -> Ctap2 at some point
           postPatch = ''
             #substituteInPlace solo/devices/base.py --replace 'CTAP1' 'Ctap1'
             substituteInPlace solo/devices/solo_v1.py --replace 'CTAP1' 'Ctap1'