From 8b2e483e6d72ab174af1c52f1c01ebcf4a05baa2 Mon Sep 17 00:00:00 2001
From: Elias Kohout <elias@kohout.de>
Date: Tue, 7 Apr 2026 17:34:26 +0200
Subject: [PATCH] Add explicit pcscd reader.conf configuration for CCID driver

---
 nixos/modules/yubikey.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/nixos/modules/yubikey.nix b/nixos/modules/yubikey.nix
index 9bb79f3..c2a42cc 100644
--- a/nixos/modules/yubikey.nix
+++ b/nixos/modules/yubikey.nix
@@ -22,6 +22,14 @@
     ln -sf "${pkgs.ccid}/pcsc/drivers/ifd-ccid.bundle" /var/lib/pcsc/drivers/ifd-ccid.bundle
   '';
 
+  # Explicitly configure pcscd reader for CCID devices (YubiKey)
+  environment.etc."reader.conf.d/yubikey-ccid.conf".text = ''
+    # YubiKey FIDO+CCID reader configuration
+    DEVICENAME      /dev/null
+    LIBPATH         ${pkgs.ccid}/lib/libccid.so
+    CHANNELID       0
+  '';
+
   # YubiKey management tools
   environment.systemPackages = with pkgs; [
     yubikey-manager          # ykman CLI