Don't set $TZ

We don't need to set $TZ, because we have /etc/localtime.  In fact,
setting $TZ without $TZDIR doesn't work anymore since Glibc no longer
contains zone info.

modules/config/timezone.nix

@@ -6,7 +6,7 @@ with pkgs.lib;
   options = {
 
     time = {
-    
+
       timeZone = mkOption {
         default = "CET";
         type = with types; uniq string;
@@ -18,7 +18,7 @@ with pkgs.lib;
         default = false;
         description = "If set, keep the hardware clock in local time instead of UTC.";
       };
-      
+
     };
   };
 
@@ -26,7 +26,6 @@ with pkgs.lib;
 
     environment.shellInit =
       ''
-        export TZ=${config.time.timeZone}
         export TZDIR=${pkgs.tzdata}/share/zoneinfo
       '';
 
@@ -34,7 +33,7 @@ with pkgs.lib;
       { source = "${pkgs.tzdata}/share/zoneinfo/${config.time.timeZone}";
         target = "localtime";
       };
-      
+
   };
-  
+
 }

modules/services/databases/postgresql.nix

@@ -161,10 +161,7 @@ in
         wantedBy = [ "multi-user.target" ];
         after = [ "network.target" ];
 
-        environment =
-          { TZ = config.time.timeZone;
-            PGDATA = cfg.dataDir;
-          };
+        environment.PGDATA = cfg.dataDir;
 
         path = [ pkgs.su postgresql ];
 

modules/services/logging/logstash.nix

@@ -140,7 +140,6 @@ in
       description = "Logstash daemon";
 
       wantedBy = [ "multi-user.target" ];
-      environment.TZ = config.time.timeZone;
 
       path = [ jre ];
 

modules/services/logging/rsyslogd.nix

@@ -92,8 +92,6 @@ in
 
         wantedBy = [ "multi-user.target" ];
 
-        environment.TZ = config.time.timeZone;
-
         serviceConfig =
           { ExecStart = "${pkgs.rsyslog}/sbin/rsyslogd ${toString cfg.extraParams} -f ${syslogConf} -n";
             ExecStartPre = "${pkgs.coreutils}/bin/mkdir -p /var/spool/rsyslog";

modules/services/logging/syslogd.nix

@@ -112,8 +112,6 @@ in
 
         wantedBy = [ "multi-user.target" ];
 
-        environment.TZ = config.time.timeZone;
-
         serviceConfig =
           { ExecStart = "${pkgs.sysklogd}/sbin/syslogd ${toString cfg.extraParams} -f ${syslogConf} -n";
             # Prevent syslogd output looping back through journald.

modules/services/mail/postfix.nix

@@ -369,8 +369,6 @@ in
 
         daemonType = "fork";
 
-        environment.TZ = config.time.timeZone;
-
         preStart =
           ''
             if ! [ -d /var/spool/postfix ]; then

modules/services/mail/spamassassin.nix

@@ -56,7 +56,6 @@ in
       wantedBy = [ "multi-user.target" ];
       after = [ "network.target" ];
 
-      environment.TZ = config.time.timeZone;
       exec = "${pkgs.spamassassin}/bin/spamd ${optionalString cfg.debug "-D"} --username=spamd --groupname=spamd --nouser-config --virtual-config-dir=/var/lib/spamassassin/user-%u --allow-tell --pidfile=/var/run/spamd.pid";
     };
 

modules/services/monitoring/smartd.nix

@@ -107,8 +107,6 @@ in
     systemd.services.smartd = {
       description = "S.M.A.R.T. Daemon";
 
-      environment.TZ = config.time.timeZone;
-
       wantedBy = [ "multi-user.target" ];
 
       serviceConfig.ExecStart = "${pkgs.smartmontools}/sbin/smartd --no-fork ${smartdFlags}";

modules/services/network-filesystems/samba.nix

@@ -64,7 +64,6 @@ let
 
       environment = {
         LD_LIBRARY_PATH = nssModulesPath;
-        TZ = config.time.timeZone;
         LOCALE_ARCHIVE = "/run/current-system/sw/lib/locale/locale-archive";
       };
 

modules/services/scheduling/cron.nix

@@ -90,12 +90,6 @@ in
 
         startOn = "startup";
 
-        # Needed to interpret times in the local timezone.
-        environment = {
-          TZ = config.time.timeZone;
-          TZDIR = "${pkgs.tzdata}/share/zoneinfo";
-        };
-
         path = [ cronNixosPkg ];
 
         preStart =

modules/services/web-servers/apache-httpd/default.nix

@@ -618,7 +618,6 @@ in
 
         environment =
           { PHPRC = if enablePHP then phpIni else "";
-            TZ = config.time.timeZone;
           } // (listToAttrs (concatMap (svc: svc.globalEnvVars) allSubservices));
 
         preStart =

modules/services/web-servers/tomcat.nix

@@ -119,8 +119,6 @@ in
         startOn = "started network-interfaces";
         stopOn = "stopping network-interfaces";
 
-        environment = { TZ = config.time.timeZone; };
-
         preStart =
           ''
             # Create the base directory

modules/services/x11/xserver.nix

@@ -461,7 +461,6 @@ in
         environment =
           { FONTCONFIG_FILE = "/etc/fonts/fonts.conf"; # !!! cleanup
             XKB_BINDIR = "${xorg.xkbcomp}/bin"; # Needed for the Xkb extension.
-            TZ = config.time.timeZone;
           } # !!! Depends on the driver selected at runtime.
             // optionalAttrs (!elem "nvidia" driverNames) {
             XORG_DRI_DRIVER_PATH = "${pkgs.mesa}/lib/dri";