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This issue is fixed in 19.03. If the login manager is GDM, then set the configuration option

{ # ...
  security.pam.services.gdm.enableGnomeKeyring = true;
}

If you don't use any login manager, you need to set the following:

{ # ...
    services.gnome3.gnome-keyring.enable = true;
}

This issue is fixed in 19.03. If the login manager is GDM, then set the configuration option

{ # ...
  security.pam.services.gdm.enableGnomeKeyring = true;
}

It has been suggested that if no login manager is used, then the following option needs to be set:

{ # ...
  services.gnome3.gnome-keyring.enable = true;
}

This issue is fixed in 19.03. If the login manager is GDM, then set the configuration option

{ # ...
  security.pam.services.gdm.enableGnomeKeyring = true;
}

This issue is fixed in 19.03. If the login manager is GDM, then set the configuration option

{ # ...
  security.pam.services.gdm.enableGnomeKeyring = true;
}

If you don't use any login manager, you need to set the following:

{ # ...
    services.gnome3.gnome-keyring.enable = true;
}

This issue is fixed, and in NixOS 18.03 this can be achieved as follows. If the login manager is LightDM, then set the configuration option

{ # ...
  security.pam.services.lightdm.enableGnomeKeyring = true;
}

This issue is fixed in 19.03. If the login manager is GDM, then set the configuration option

{ # ...
  security.pam.services.gdm.enableGnomeKeyring = true;
}