treewide: use attrs instead of list for types.loaOf options

nixos/modules/security/duosec.nix

@@ -25,19 +25,21 @@ let
     accept_env_factor=${boolToStr cfg.acceptEnvFactor}
   '';
 
-  loginCfgFile = optional cfg.ssh.enable
-    { source = pkgs.writeText "login_duo.conf" configFileLogin;
-      mode   = "0600";
-      user   = "sshd";
-      target = "duo/login_duo.conf";
-    };
+  loginCfgFile = optionalAttrs cfg.ssh.enable {
+    "duo/login_duo.conf" =
+      { source = pkgs.writeText "login_duo.conf" configFileLogin;
+        mode   = "0600";
+        user   = "sshd";
+      };
+  };
 
-  pamCfgFile = optional cfg.pam.enable
-    { source = pkgs.writeText "pam_duo.conf" configFilePam;
-      mode   = "0600";
-      user   = "sshd";
-      target = "duo/pam_duo.conf";
-    };
+  pamCfgFile = optional cfg.pam.enable {
+    "duo/pam_duo.conf" =
+      { source = pkgs.writeText "pam_duo.conf" configFilePam;
+        mode   = "0600";
+        user   = "sshd";
+      };
+  };
 in
 {
   options = {
@@ -186,7 +188,7 @@ in
      environment.systemPackages = [ pkgs.duo-unix ];
 
      security.wrappers.login_duo.source = "${pkgs.duo-unix.out}/bin/login_duo";
-     environment.etc = loginCfgFile ++ pamCfgFile;
+     environment.etc = loginCfgFile // pamCfgFile;
 
      /* If PAM *and* SSH are enabled, then don't do anything special.
      If PAM isn't used, set the default SSH-only options. */

nixos/modules/security/pam.nix

@@ -475,9 +475,9 @@ let
 
   motd = pkgs.writeText "motd" config.users.motd;
 
-  makePAMService = pamService:
-    { source = pkgs.writeText "${pamService.name}.pam" pamService.text;
-      target = "pam.d/${pamService.name}";
+  makePAMService = name: service:
+    { name = "pam.d/${name}";
+      value.source = pkgs.writeText "${name}.pam" service.text;
     };
 
 in
@@ -760,8 +760,7 @@ in
       };
     };
 
-    environment.etc =
-      mapAttrsToList (n: v: makePAMService v) config.security.pam.services;
+    environment.etc = mapAttrs' makePAMService config.security.pam.services;
 
     security.pam.services =
       { other.text =

nixos/modules/security/pam_mount.nix

@@ -36,8 +36,7 @@ in
   config = mkIf (cfg.enable || anyPamMount) {
 
     environment.systemPackages = [ pkgs.pam_mount ];
-    environment.etc = [{
-      target = "security/pam_mount.conf.xml";
+    environment.etc."security/pam_mount.conf.xml" = {
       source =
         let
           extraUserVolumes = filterAttrs (n: u: u.cryptHomeLuks != null) config.users.users;
@@ -66,7 +65,7 @@ in
           ${concatStringsSep "\n" cfg.extraVolumes}
           </pam_mount>
           '';
-    }];
+    };
 
   };
 }

nixos/modules/security/rtkit.nix

@@ -34,9 +34,8 @@ with lib;
 
     services.dbus.packages = [ pkgs.rtkit ];
 
-    users.users = singleton
-      { name = "rtkit";
-        uid = config.ids.uids.rtkit;
+    users.users.rtkit =
+      { uid = config.ids.uids.rtkit;
         description = "RealtimeKit daemon";
       };
 

nixos/modules/security/sudo.nix

@@ -212,7 +212,7 @@ in
 
     security.pam.services.sudo = { sshAgentAuth = true; };
 
-    environment.etc = singleton
+    environment.etc.sudoers =
       { source =
           pkgs.runCommand "sudoers"
           {
@@ -222,7 +222,6 @@ in
           # Make sure that the sudoers file is syntactically valid.
           # (currently disabled - NIXOS-66)
           "${pkgs.buildPackages.sudo}/sbin/visudo -f $src -c && cp $src $out";
-        target = "sudoers";
         mode = "0440";
       };