From 4283a9df9d6522d05733eb0ba98e0db7235df63e Mon Sep 17 00:00:00 2001
From: Gregory Rudolph <rudi@nightmare.haus>
Date: Thu, 19 Nov 2020 22:18:33 -0500
Subject: [PATCH] Why is pam_unix required, even if unixAuth = false

---
 nixos/modules/security/pam.nix | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/nixos/modules/security/pam.nix b/nixos/modules/security/pam.nix
index a517f9e51ce17..a45b8d2058c80 100644
--- a/nixos/modules/security/pam.nix
+++ b/nixos/modules/security/pam.nix
@@ -372,7 +372,8 @@ let
       text = mkDefault
         (''
           # Account management.
-          account required pam_unix.so
+          ${optionalString unixAuth
+            "account required pam_unix.so"}
           ${optionalString use_ldap
               "account sufficient ${pam_ldap}/lib/security/pam_ldap.so"}
           ${optionalString (config.services.sssd.enable && cfg.sssdStrictAccess==false)
@@ -424,7 +425,8 @@ let
             || cfg.googleAuthenticator.enable
             || cfg.gnupg.enable
             || cfg.duoSecurity.enable)) ''
-              auth required pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth
+              ${optionalString unixAuth
+                  "auth required pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth"}
               ${optionalString config.security.pam.enableEcryptfs
                 "auth optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so unwrap"}
               ${optionalString cfg.pamMount
@@ -477,7 +479,8 @@ let
           ${optionalString cfg.setEnvironment ''
             session required pam_env.so conffile=${config.system.build.pamEnvironment} readenv=0
           ''}
-          session required pam_unix.so
+          ${optionalString unixAuth 
+            "session required pam_unix.so"}
           ${optionalString cfg.setLoginUid
               "session ${
                 if config.boot.isContainer then "optional" else "required"