Merge pull request #299652 from philiptaron/issue-208242/nixos/lib/systemd

Avoid top-level `with ...;` in `nixos/lib/systemd*`

5 files changed, 261 insertions, 114 deletions

diff --git a/nixos/lib/systemd-lib.nix b/nixos/lib/systemd-lib.nix
index c00b2d0f207c6..832160111da4e 100644
--- a/nixos/lib/systemd-lib.nix
+++ b/nixos/lib/systemd-lib.nix
@@ -1,8 +1,47 @@
 { config, lib, pkgs }:
 
-with lib;
-
 let
+  inherit (lib)
+    all
+    attrByPath
+    attrNames
+    concatLists
+    concatMap
+    concatMapStrings
+    concatStrings
+    concatStringsSep
+    const
+    elem
+    filter
+    filterAttrs
+    flip
+    head
+    isInt
+    isList
+    length
+    makeBinPath
+    makeSearchPathOutput
+    mapAttrs
+    mapAttrsToList
+    mkAfter
+    mkIf
+    optional
+    optionalAttrs
+    optionalString
+    range
+    replaceStrings
+    reverseList
+    splitString
+    stringLength
+    stringToCharacters
+    tail
+    toIntBase10
+    trace
+    types
+    ;
+
+  inherit (lib.strings) toJSON;
+
   cfg = config.systemd;
   lndir = "${pkgs.buildPackages.xorg.lndir}/bin/lndir";
   systemd = cfg.package;
@@ -10,7 +49,7 @@ in rec {
 
   shellEscape = s: (replaceStrings [ "\\" ] [ "\\\\" ] s);
 
-  mkPathSafeName = lib.replaceStrings ["@" ":" "\\" "[" "]"] ["-" "-" "-" "" ""];
+  mkPathSafeName = replaceStrings ["@" ":" "\\" "[" "]"] ["-" "-" "-" "" ""];
 
   # a type for options that take a unit name
   unitNameType = types.strMatching "[a-zA-Z0-9@%:_.\\-]+[.](service|socket|device|mount|automount|swap|target|path|timer|scope|slice)";
@@ -133,7 +172,7 @@ in rec {
     )) attrs;
     errors = concatMap (c: c group defs) checks;
   in if errors == [] then true
-     else builtins.trace (concatStringsSep "\n" errors) false;
+     else trace (concatStringsSep "\n" errors) false;
 
   toOption = x:
     if x == true then "true"
@@ -220,7 +259,7 @@ in rec {
       # upstream unit.
       for i in ${toString (mapAttrsToList
           (n: v: v.unit)
-          (lib.filterAttrs (n: v: (attrByPath [ "overrideStrategy" ] "asDropinIfExists" v) == "asDropinIfExists") units))}; do
+          (filterAttrs (n: v: (attrByPath [ "overrideStrategy" ] "asDropinIfExists" v) == "asDropinIfExists") units))}; do
         fn=$(basename $i/*)
         if [ -e $out/$fn ]; then
           if [ "$(readlink -f $i/$fn)" = /dev/null ]; then
@@ -243,7 +282,7 @@ in rec {
       # treated as drop-in file.
       for i in ${toString (mapAttrsToList
           (n: v: v.unit)
-          (lib.filterAttrs (n: v: v ? overrideStrategy && v.overrideStrategy == "asDropin") units))}; do
+          (filterAttrs (n: v: v ? overrideStrategy && v.overrideStrategy == "asDropin") units))}; do
         fn=$(basename $i/*)
         mkdir -p $out/$fn.d
         ln -s $i/$fn $out/$fn.d/overrides.conf
@@ -384,7 +423,7 @@ in rec {
   commonUnitText = def: lines: ''
       [Unit]
       ${attrsToSection def.unitConfig}
-    '' + lines + lib.optionalString (def.wantedBy != [ ]) ''
+    '' + lines + optionalString (def.wantedBy != [ ]) ''
 
       [Install]
       WantedBy=${concatStringsSep " " def.wantedBy}
@@ -406,7 +445,7 @@ in rec {
       '' + (let env = cfg.globalEnvironment // def.environment;
         in concatMapStrings (n:
           let s = optionalString (env.${n} != null)
-            "Environment=${builtins.toJSON "${n}=${env.${n}}"}\n";
+            "Environment=${toJSON "${n}=${env.${n}}"}\n";
           # systemd max line length is now 1MiB
           # https://github.com/systemd/systemd/commit/e6dde451a51dc5aaa7f4d98d39b8fe735f73d2af
           in if stringLength s >= 1048576 then throw "The value of the environment variable ‘${n}’ in systemd service ‘${name}.service’ is too long." else s) (attrNames env))
@@ -475,13 +514,13 @@ in rec {
   # in that attrset are determined by the supplied format.
   definitions = directoryName: format: definitionAttrs:
     let
-      listOfDefinitions = lib.mapAttrsToList
+      listOfDefinitions = mapAttrsToList
         (name: format.generate "${name}.conf")
         definitionAttrs;
     in
     pkgs.runCommand directoryName { } ''
       mkdir -p $out
-      ${(lib.concatStringsSep "\n"
+      ${(concatStringsSep "\n"
         (map (pkg: "cp ${pkg} $out/${pkg.name}") listOfDefinitions)
       )}
     '';
diff --git a/nixos/lib/systemd-network-units.nix b/nixos/lib/systemd-network-units.nix
index 1d5f823f3678d..986586a61a705 100644
--- a/nixos/lib/systemd-network-units.nix
+++ b/nixos/lib/systemd-network-units.nix
@@ -1,8 +1,13 @@
 { lib, systemdUtils }:
 
-with lib;
-
 let
+  inherit (lib)
+    concatMapStrings
+    concatStringsSep
+    flip
+    optionalString
+    ;
+
   attrsToSection = systemdUtils.lib.attrsToSection;
   commonMatchText = def:
     optionalString (def.matchConfig != { }) ''
diff --git a/nixos/lib/systemd-types.nix b/nixos/lib/systemd-types.nix
index a109f248b1704..ba8bed35e1c05 100644
--- a/nixos/lib/systemd-types.nix
+++ b/nixos/lib/systemd-types.nix
@@ -1,47 +1,91 @@
 { lib, systemdUtils, pkgs }:
 
-with systemdUtils.lib;
-with systemdUtils.unitOptions;
-with lib;
+let
+  inherit (systemdUtils.lib)
+    automountConfig
+    makeUnit
+    mountConfig
+    stage1ServiceConfig
+    stage2ServiceConfig
+    unitConfig
+    ;
+
+  inherit (systemdUtils.unitOptions)
+    concreteUnitOptions
+    stage1AutomountOptions
+    stage1CommonUnitOptions
+    stage1MountOptions
+    stage1PathOptions
+    stage1ServiceOptions
+    stage1SliceOptions
+    stage1SocketOptions
+    stage1TimerOptions
+    stage2AutomountOptions
+    stage2CommonUnitOptions
+    stage2MountOptions
+    stage2PathOptions
+    stage2ServiceOptions
+    stage2SliceOptions
+    stage2SocketOptions
+    stage2TimerOptions
+    ;
+
+  inherit (lib)
+    mdDoc
+    mkDefault
+    mkDerivedConfig
+    mkEnableOption
+    mkIf
+    mkOption
+    ;
+
+  inherit (lib.types)
+    attrsOf
+    lines
+    listOf
+    nullOr
+    path
+    submodule
+    ;
+in
 
 rec {
-  units = with types;
-    attrsOf (submodule ({ name, config, ... }: {
-      options = concreteUnitOptions;
-      config = { unit = mkDefault (systemdUtils.lib.makeUnit name config); };
-    }));
+  units = attrsOf (submodule ({ name, config, ... }: {
+    options = concreteUnitOptions;
+    config = { unit = mkDefault (makeUnit name config); };
+  }));
 
-  services = with types; attrsOf (submodule [ stage2ServiceOptions unitConfig stage2ServiceConfig ]);
-  initrdServices = with types; attrsOf (submodule [ stage1ServiceOptions unitConfig stage1ServiceConfig ]);
+  services = attrsOf (submodule [ stage2ServiceOptions unitConfig stage2ServiceConfig ]);
+  initrdServices = attrsOf (submodule [ stage1ServiceOptions unitConfig stage1ServiceConfig ]);
 
-  targets = with types; attrsOf (submodule [ stage2CommonUnitOptions unitConfig ]);
-  initrdTargets = with types; attrsOf (submodule [ stage1CommonUnitOptions unitConfig ]);
+  targets = attrsOf (submodule [ stage2CommonUnitOptions unitConfig ]);
+  initrdTargets = attrsOf (submodule [ stage1CommonUnitOptions unitConfig ]);
 
-  sockets = with types; attrsOf (submodule [ stage2SocketOptions unitConfig ]);
-  initrdSockets = with types; attrsOf (submodule [ stage1SocketOptions unitConfig ]);
+  sockets = attrsOf (submodule [ stage2SocketOptions unitConfig ]);
+  initrdSockets = attrsOf (submodule [ stage1SocketOptions unitConfig ]);
 
-  timers = with types; attrsOf (submodule [ stage2TimerOptions unitConfig ]);
-  initrdTimers = with types; attrsOf (submodule [ stage1TimerOptions unitConfig ]);
+  timers = attrsOf (submodule [ stage2TimerOptions unitConfig ]);
+  initrdTimers = attrsOf (submodule [ stage1TimerOptions unitConfig ]);
 
-  paths = with types; attrsOf (submodule [ stage2PathOptions unitConfig ]);
-  initrdPaths = with types; attrsOf (submodule [ stage1PathOptions unitConfig ]);
+  paths = attrsOf (submodule [ stage2PathOptions unitConfig ]);
+  initrdPaths = attrsOf (submodule [ stage1PathOptions unitConfig ]);
 
-  slices = with types; attrsOf (submodule [ stage2SliceOptions unitConfig ]);
-  initrdSlices = with types; attrsOf (submodule [ stage1SliceOptions unitConfig ]);
+  slices = attrsOf (submodule [ stage2SliceOptions unitConfig ]);
+  initrdSlices = attrsOf (submodule [ stage1SliceOptions unitConfig ]);
 
-  mounts = with types; listOf (submodule [ stage2MountOptions unitConfig mountConfig ]);
-  initrdMounts = with types; listOf (submodule [ stage1MountOptions unitConfig mountConfig ]);
+  mounts = listOf (submodule [ stage2MountOptions unitConfig mountConfig ]);
+  initrdMounts = listOf (submodule [ stage1MountOptions unitConfig mountConfig ]);
 
-  automounts = with types; listOf (submodule [ stage2AutomountOptions unitConfig automountConfig ]);
-  initrdAutomounts = with types; attrsOf (submodule [ stage1AutomountOptions unitConfig automountConfig ]);
+  automounts = listOf (submodule [ stage2AutomountOptions unitConfig automountConfig ]);
+  initrdAutomounts = attrsOf (submodule [ stage1AutomountOptions unitConfig automountConfig ]);
 
-  initrdContents = types.attrsOf (types.submodule ({ config, options, name, ... }: {
+  initrdContents = attrsOf (submodule ({ config, options, name, ... }: {
     options = {
-      enable = mkEnableOption (lib.mdDoc "copying of this file and symlinking it") // { default = true; };
+      enable = mkEnableOption (mdDoc "copying of this file and symlinking it") // { default = true; };
 
       target = mkOption {
-        type = types.path;
-        description = lib.mdDoc ''
+        type = path;
+        description = mdDoc ''
           Path of the symlink.
         '';
         default = name;
@@ -49,13 +93,13 @@ rec {
 
       text = mkOption {
         default = null;
-        type = types.nullOr types.lines;
-        description = lib.mdDoc "Text of the file.";
+        type = nullOr lines;
+        description = mdDoc "Text of the file.";
       };
 
       source = mkOption {
-        type = types.path;
-        description = lib.mdDoc "Path of the source file.";
+        type = path;
+        description = mdDoc "Path of the source file.";
       };
     };
 
diff --git a/nixos/lib/systemd-unit-options.nix b/nixos/lib/systemd-unit-options.nix
index e4953ba72dd92..db644e0065521 100644
--- a/nixos/lib/systemd-unit-options.nix
+++ b/nixos/lib/systemd-unit-options.nix
@@ -1,9 +1,33 @@
 { lib, systemdUtils }:
 
-with systemdUtils.lib;
-with lib;
-
 let
+  inherit (systemdUtils.lib)
+    assertValueOneOf
+    automountConfig
+    checkUnitConfig
+    makeJobScript
+    mountConfig
+    serviceConfig
+    unitConfig
+    unitNameType
+    ;
+
+  inherit (lib)
+    any
+    concatMap
+    filterOverrides
+    isList
+    mdDoc
+    mergeEqualOption
+    mkIf
+    mkMerge
+    mkOption
+    mkOptionType
+    singleton
+    toList
+    types
+    ;
+
   checkService = checkUnitConfig "Service" [
     (assertValueOneOf "Type" [
       "exec" "simple" "forking" "oneshot" "dbus" "notify" "notify-reload" "idle"
@@ -31,7 +55,7 @@ in rec {
     enable = mkOption {
       default = true;
       type = types.bool;
-      description = lib.mdDoc ''
+      description = mdDoc ''
         If set to false, this unit will be a symlink to
         /dev/null. This is primarily useful to prevent specific
         template instances
@@ -45,7 +69,7 @@ in rec {
     overrideStrategy = mkOption {
       default = "asDropinIfExists";
       type = types.enum [ "asDropinIfExists" "asDropin" ];
-      description = lib.mdDoc ''
+      description = mdDoc ''
         Defines how unit configuration is provided for systemd:
 
         `asDropinIfExists` creates a unit file when no unit file is provided by the package
@@ -61,7 +85,7 @@ in rec {
     requiredBy = mkOption {
       default = [];
       type = types.listOf unitNameType;
-      description = lib.mdDoc ''
+      description = mdDoc ''
         Units that require (i.e. depend on and need to go down with) this unit.
         As discussed in the `wantedBy` option description this also creates
         `.requires` symlinks automatically.
@@ -71,7 +95,7 @@ in rec {
     upheldBy = mkOption {
       default = [];
       type = types.listOf unitNameType;
-      description = lib.mdDoc ''
+      description = mdDoc ''
         Keep this unit running as long as the listed units are running. This is a continuously
         enforced version of wantedBy.
       '';
@@ -80,7 +104,7 @@ in rec {
     wantedBy = mkOption {
       default = [];
       type = types.listOf unitNameType;
-      description = lib.mdDoc ''
+      description = mdDoc ''
         Units that want (i.e. depend on) this unit. The default method for
         starting a unit by default at boot time is to set this option to
         `["multi-user.target"]` for system services. Likewise for user units
@@ -98,7 +122,7 @@ in rec {
     aliases = mkOption {
       default = [];
       type = types.listOf unitNameType;
-      description = lib.mdDoc "Aliases of that unit.";
+      description = mdDoc "Aliases of that unit.";
     };
 
   };
@@ -108,12 +132,12 @@ in rec {
     text = mkOption {
       type = types.nullOr types.str;
       default = null;
-      description = lib.mdDoc "Text of this systemd unit.";
+      description = mdDoc "Text of this systemd unit.";
     };
 
     unit = mkOption {
       internal = true;
-      description = lib.mdDoc "The generated unit.";
+      description = mdDoc "The generated unit.";
     };
 
   };
@@ -124,19 +148,19 @@ in rec {
       description = mkOption {
         default = "";
         type = types.singleLineStr;
-        description = lib.mdDoc "Description of this unit used in systemd messages and progress indicators.";
+        description = mdDoc "Description of this unit used in systemd messages and progress indicators.";
       };
 
       documentation = mkOption {
         default = [];
         type = types.listOf types.str;
-        description = lib.mdDoc "A list of URIs referencing documentation for this unit or its configuration.";
+        description = mdDoc "A list of URIs referencing documentation for this unit or its configuration.";
       };
 
       requires = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Start the specified units when this unit is started, and stop
           this unit when the specified units are stopped or fail.
         '';
@@ -145,7 +169,7 @@ in rec {
       wants = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Start the specified units when this unit is started.
         '';
       };
@@ -153,7 +177,7 @@ in rec {
       upholds = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Keeps the specified running while this unit is running. A continuous version of `wants`.
         '';
       };
@@ -161,7 +185,7 @@ in rec {
       after = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           If the specified units are started at the same time as
           this unit, delay this unit until they have started.
         '';
@@ -170,7 +194,7 @@ in rec {
       before = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           If the specified units are started at the same time as
           this unit, delay them until this unit has started.
         '';
@@ -179,7 +203,7 @@ in rec {
       bindsTo = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Like ‘requires’, but in addition, if the specified units
           unexpectedly disappear, this unit will be stopped as well.
         '';
@@ -188,7 +212,7 @@ in rec {
       partOf = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           If the specified units are stopped or restarted, then this
           unit is stopped or restarted as well.
         '';
@@ -197,7 +221,7 @@ in rec {
       conflicts = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           If the specified units are started, then this unit is stopped
           and vice versa.
         '';
@@ -206,7 +230,7 @@ in rec {
       requisite = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Similar to requires. However if the units listed are not started,
           they will not be started and the transaction will fail.
         '';
@@ -216,7 +240,7 @@ in rec {
         default = {};
         example = { RequiresMountsFor = "/data"; };
         type = types.attrsOf unitOption;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Each attribute in this set specifies an option in the
           `[Unit]` section of the unit.  See
           {manpage}`systemd.unit(5)` for details.
@@ -226,7 +250,7 @@ in rec {
       onFailure = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           A list of one or more units that are activated when
           this unit enters the "failed" state.
         '';
@@ -235,7 +259,7 @@ in rec {
       onSuccess = mkOption {
         default = [];
         type = types.listOf unitNameType;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           A list of one or more units that are activated when
           this unit enters the "inactive" state.
         '';
@@ -243,7 +267,7 @@ in rec {
 
       startLimitBurst = mkOption {
          type = types.int;
-         description = lib.mdDoc ''
+         description = mdDoc ''
            Configure unit start rate limiting. Units which are started
            more than startLimitBurst times within an interval time
            interval are not permitted to start any more.
@@ -252,7 +276,7 @@ in rec {
 
       startLimitIntervalSec = mkOption {
          type = types.int;
-         description = lib.mdDoc ''
+         description = mdDoc ''
            Configure unit start rate limiting. Units which are started
            more than startLimitBurst times within an interval time
            interval are not permitted to start any more.
@@ -271,7 +295,7 @@ in rec {
       restartTriggers = mkOption {
         default = [];
         type = types.listOf types.unspecified;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           An arbitrary list of items such as derivations.  If any item
           in the list changes between reconfigurations, the service will
           be restarted.
@@ -281,7 +305,7 @@ in rec {
       reloadTriggers = mkOption {
         default = [];
         type = types.listOf unitOption;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           An arbitrary list of items such as derivations.  If any item
           in the list changes between reconfigurations, the service will
           be reloaded.  If anything but a reload trigger changes in the
@@ -299,13 +323,13 @@ in rec {
         default = {};
         type = with types; attrsOf (nullOr (oneOf [ str path package ]));
         example = { PATH = "/foo/bar/bin"; LANG = "nl_NL.UTF-8"; };
-        description = lib.mdDoc "Environment variables passed to the service's processes.";
+        description = mdDoc "Environment variables passed to the service's processes.";
       };
 
       path = mkOption {
         default = [];
         type = with types; listOf (oneOf [ package str ]);
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Packages added to the service's {env}`PATH`
           environment variable.  Both the {file}`bin`
           and {file}`sbin` subdirectories of each
@@ -319,7 +343,7 @@ in rec {
           { RestartSec = 5;
           };
         type = types.addCheck (types.attrsOf unitOption) checkService;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Each attribute in this set specifies an option in the
           `[Service]` section of the unit.  See
           {manpage}`systemd.service(5)` for details.
@@ -329,14 +353,14 @@ in rec {
       script = mkOption {
         type = types.lines;
         default = "";
-        description = lib.mdDoc "Shell commands executed as the service's main process.";
+        description = mdDoc "Shell commands executed as the service's main process.";
       };
 
       scriptArgs = mkOption {
         type = types.str;
         default = "";
         example = "%i";
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Arguments passed to the main process script.
           Can contain specifiers (`%` placeholders expanded by systemd, see {manpage}`systemd.unit(5)`).
         '';
@@ -345,7 +369,7 @@ in rec {
       preStart = mkOption {
         type = types.lines;
         default = "";
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Shell commands executed before the service's main process
           is started.
         '';
@@ -354,7 +378,7 @@ in rec {
       postStart = mkOption {
         type = types.lines;
         default = "";
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Shell commands executed after the service's main process
           is started.
         '';
@@ -363,7 +387,7 @@ in rec {
       reload = mkOption {
         type = types.lines;
         default = "";
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Shell commands executed when the service's main process
           is reloaded.
         '';
@@ -372,7 +396,7 @@ in rec {
       preStop = mkOption {
         type = types.lines;
         default = "";
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Shell commands executed to stop the service.
         '';
       };
@@ -380,7 +404,7 @@ in rec {
       postStop = mkOption {
         type = types.lines;
         default = "";
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Shell commands executed after the service's main process
           has exited.
         '';
@@ -389,7 +413,7 @@ in rec {
       jobScripts = mkOption {
         type = with types; coercedTo path singleton (listOf path);
         internal = true;
-        description = lib.mdDoc "A list of all job script derivations of this unit.";
+        description = mdDoc "A list of all job script derivations of this unit.";
         default = [];
       };
 
@@ -434,7 +458,7 @@ in rec {
       restartIfChanged = mkOption {
         type = types.bool;
         default = true;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Whether the service should be restarted during a NixOS
           configuration switch if its definition has changed.
         '';
@@ -443,7 +467,7 @@ in rec {
       reloadIfChanged = mkOption {
         type = types.bool;
         default = false;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Whether the service should be reloaded during a NixOS
           configuration switch if its definition has changed.  If
           enabled, the value of {option}`restartIfChanged` is
@@ -459,7 +483,7 @@ in rec {
       stopIfChanged = mkOption {
         type = types.bool;
         default = true;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           If set, a changed unit is restarted by calling
           {command}`systemctl stop` in the old configuration,
           then {command}`systemctl start` in the new one.
@@ -475,7 +499,7 @@ in rec {
         type = with types; either str (listOf str);
         default = [];
         example = "Sun 14:00:00";
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Automatically start this unit at the given date/time, which
           must be in the format described in
           {manpage}`systemd.time(7)`.  This is equivalent
@@ -502,7 +526,7 @@ in rec {
         default = [];
         type = types.listOf types.str;
         example = [ "0.0.0.0:993" "/run/my-socket" ];
-        description = lib.mdDoc ''
+        description = mdDoc ''
           For each item in this list, a `ListenStream`
           option in the `[Socket]` section will be created.
         '';
@@ -512,7 +536,7 @@ in rec {
         default = [];
         type = types.listOf types.str;
         example = [ "0.0.0.0:993" "/run/my-socket" ];
-        description = lib.mdDoc ''
+        description = mdDoc ''
           For each item in this list, a `ListenDatagram`
           option in the `[Socket]` section will be created.
         '';
@@ -522,7 +546,7 @@ in rec {
         default = {};
         example = { ListenStream = "/run/my-socket"; };
         type = types.attrsOf unitOption;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Each attribute in this set specifies an option in the
           `[Socket]` section of the unit.  See
           {manpage}`systemd.socket(5)` for details.
@@ -554,7 +578,7 @@ in rec {
         default = {};
         example = { OnCalendar = "Sun 14:00:00"; Unit = "foo.service"; };
         type = types.attrsOf unitOption;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Each attribute in this set specifies an option in the
           `[Timer]` section of the unit.  See
           {manpage}`systemd.timer(5)` and
@@ -587,7 +611,7 @@ in rec {
         default = {};
         example = { PathChanged = "/some/path"; Unit = "changedpath.service"; };
         type = types.attrsOf unitOption;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Each attribute in this set specifies an option in the
           `[Path]` section of the unit.  See
           {manpage}`systemd.path(5)` for details.
@@ -618,13 +642,13 @@ in rec {
       what = mkOption {
         example = "/dev/sda1";
         type = types.str;
-        description = lib.mdDoc "Absolute path of device node, file or other resource. (Mandatory)";
+        description = mdDoc "Absolute path of device node, file or other resource. (Mandatory)";
       };
 
       where = mkOption {
         example = "/mnt";
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Absolute path of a directory of the mount point.
           Will be created if it doesn't exist. (Mandatory)
         '';
@@ -634,21 +658,21 @@ in rec {
         default = "";
         example = "ext4";
         type = types.str;
-        description = lib.mdDoc "File system type.";
+        description = mdDoc "File system type.";
       };
 
       options = mkOption {
         default = "";
         example = "noatime";
         type = types.commas;
-        description = lib.mdDoc "Options used to mount the file system.";
+        description = mdDoc "Options used to mount the file system.";
       };
 
       mountConfig = mkOption {
         default = {};
         example = { DirectoryMode = "0775"; };
         type = types.attrsOf unitOption;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Each attribute in this set specifies an option in the
           `[Mount]` section of the unit.  See
           {manpage}`systemd.mount(5)` for details.
@@ -678,7 +702,7 @@ in rec {
       where = mkOption {
         example = "/mnt";
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Absolute path of a directory of the mount point.
           Will be created if it doesn't exist. (Mandatory)
         '';
@@ -688,7 +712,7 @@ in rec {
         default = {};
         example = { DirectoryMode = "0775"; };
         type = types.attrsOf unitOption;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Each attribute in this set specifies an option in the
           `[Automount]` section of the unit.  See
           {manpage}`systemd.automount(5)` for details.
@@ -719,7 +743,7 @@ in rec {
         default = {};
         example = { MemoryMax = "2G"; };
         type = types.attrsOf unitOption;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Each attribute in this set specifies an option in the
           `[Slice]` section of the unit.  See
           {manpage}`systemd.slice(5)` for details.
diff --git a/nixos/lib/utils.nix b/nixos/lib/utils.nix
index 22a2c79843c66..4992113bdbd25 100644
--- a/nixos/lib/utils.nix
+++ b/nixos/lib/utils.nix
@@ -1,9 +1,44 @@
-{ lib, config, pkgs }: with lib;
+{ lib, config, pkgs }:
+
+let
+  inherit (lib)
+    any
+    attrNames
+    concatMapStringsSep
+    concatStringsSep
+    elem
+    escapeShellArg
+    filter
+    flatten
+    getName
+    hasPrefix
+    hasSuffix
+    imap0
+    imap1
+    isAttrs
+    isDerivation
+    isFloat
+    isInt
+    isList
+    isPath
+    isString
+    listToAttrs
+    nameValuePair
+    optionalString
+    removePrefix
+    removeSuffix
+    replaceStrings
+    stringToCharacters
+    types
+    ;
+
+  inherit (lib.strings) toJSON normalizePath escapeC;
+in
 
 rec {
 
   # Copy configuration files to avoid having the entire sources in the system closure
-  copyFile = filePath: pkgs.runCommand (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) {} ''
+  copyFile = filePath: pkgs.runCommand (builtins.unsafeDiscardStringContext (baseNameOf filePath)) {} ''
     cp ${filePath} $out
   '';
 
@@ -46,11 +81,11 @@ rec {
   escapeSystemdPath = s: let
     replacePrefix = p: r: s: (if (hasPrefix p s) then r + (removePrefix p s) else s);
     trim = s: removeSuffix "/" (removePrefix "/" s);
-    normalizedPath = strings.normalizePath s;
+    normalizedPath = normalizePath s;
   in
     replaceStrings ["/"] ["-"]
-    (replacePrefix "." (strings.escapeC ["."] ".")
-    (strings.escapeC (stringToCharacters " !\"#$%&'()*+,;<=>=@[\\]^`{|}~-")
+    (replacePrefix "." (escapeC ["."] ".")
+    (escapeC (stringToCharacters " !\"#$%&'()*+,;<=>=@[\\]^`{|}~-")
     (if normalizedPath == "/" then normalizedPath else trim normalizedPath)));
 
   # Quotes an argument for use in Exec* service lines.
@@ -62,12 +97,12 @@ rec {
   # substitution for the directive.
   escapeSystemdExecArg = arg:
     let
-      s = if builtins.isPath arg then "${arg}"
-        else if builtins.isString arg then arg
-        else if builtins.isInt arg || builtins.isFloat arg || lib.isDerivation arg then toString arg
+      s = if isPath arg then "${arg}"
+        else if isString arg then arg
+        else if isInt arg || isFloat arg || isDerivation arg then toString arg
         else throw "escapeSystemdExecArg only allows strings, paths, numbers and derivations";
     in
-      replaceStrings [ "%" "$" ] [ "%%" "$$" ] (builtins.toJSON s);
+      replaceStrings [ "%" "$" ] [ "%%" "$$" ] (toJSON s);
 
   # Quotes a list of arguments into a single string for use in a Exec*
   # line.
@@ -197,7 +232,7 @@ rec {
                (attrNames secrets))
     + "\n"
     + "${pkgs.jq}/bin/jq >'${output}' "
-    + lib.escapeShellArg (stringOrDefault
+    + escapeShellArg (stringOrDefault
           (concatStringsSep
             " | "
             (imap1 (index: name: ''${name} = $ENV.secret${toString index}'')
@@ -205,7 +240,7 @@ rec {
           ".")
     + ''
        <<'EOF'
-      ${builtins.toJSON set}
+      ${toJSON set}
       EOF
       (( ! $inherit_errexit_enabled )) && shopt -u inherit_errexit
     '';
@@ -222,9 +257,9 @@ rec {
   */
   removePackagesByName = packages: packagesToRemove:
     let
-      namesToRemove = map lib.getName packagesToRemove;
+      namesToRemove = map getName packagesToRemove;
     in
-      lib.filter (x: !(builtins.elem (lib.getName x) namesToRemove)) packages;
+      filter (x: !(elem (getName x) namesToRemove)) packages;
 
   systemdUtils = {
     lib = import ./systemd-lib.nix { inherit lib config pkgs; };