Since NixOS is an unusual system, I’ve decided to ask here before talking to the GnuPG people.
How can I access a smart card? 'pccardctl' (see https://github.com/NixOS/nixpkgs/pull/6172) detects it: $ /nix/store/dwibbrcls43c0bxkcj52qj6mi8xipd6a-pcmciautils-017/bin/pccardctl ls Socket 0 Bridge: [yenta_cardbus] (bus ID: 0000:05:00.0) Socket 0 Device 0: [cm4040_cs] (bus ID: 0.0) $ /nix/store/dwibbrcls43c0bxkcj52qj6mi8xipd6a-pcmciautils-017/bin/pccardctl status Socket 0: 5.0V 16-bit PC Card Subdevice 0 (function 0) bound to driver "cm4040_cs" $ /nix/store/dwibbrcls43c0bxkcj52qj6mi8xipd6a-pcmciautils-017/bin/pccardctl ident Socket 0: product info: "OMNIKEY", "CardMan 4040", "", "" manfid: 0x0223, 0x0200 I've tried adding the following lines to 'configuration.nix' as suggested in https://bugs.launchpad.net/ubuntu/+source/gnupg/+bug/107337, but it doesn't make a difference: services.udev.extraRules = '' SUBSYSTEM=="cardman_4040", GROUP="scard", MODE="0660" ''; users.extraGroups = { sdcard = { }; }; users.extraGroups.sdcard.members = [ "nikita" ]; After switching to the new config and rebooting: $ ls -l /dev/cmx0 crw-rw---- 1 root root 248, 0 Feb 5 16:45 /dev/cmx0 $ gpg2 --card-edit scdaemon[2242]: error sending PC/SC OPEN request: Broken pipe scdaemon[2242]: error sending PC/SC OPEN request: Broken pipe gpg: selecting openpgp failed: Card error gpg: OpenPGP card not available: Card error With ‘sudo’: $ sudo gpg2 --card-status gpg: selecting openpgp failed: Card not present gpg: OpenPGP card not available: Card not present
pgpG11_Vw2oIi.pgp
Description: PGP signature
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