nix: what do you mean baseNameOf is not in lib

nix/module.nix

@@ -5,6 +5,7 @@ self: {
   pkgs,
   ...
 }: let
+  inherit (builtins) toJSON baseNameOf toString;
   inherit (lib.modules) mkIf;
   inherit (lib.options) mkOption mkEnableOption literalExpression;
   inherit (lib.types) package str port int listOf enum bool attrsOf path;
@@ -13,7 +14,7 @@ self: {
   cfg = config.services.eris;
 
   # Generate the config.json content
-  erisConfigFile = pkgs.writeText "eris-config.json" (builtins.toJSON {
+  erisConfigFile = pkgs.writeText "eris-config.json" (toJSON {
     listen_addr = cfg.listenAddress;
     metrics_port = cfg.metricsPort;
     backend_addr = cfg.backendAddress;
@@ -326,8 +327,8 @@ in {
         RestrictSUIDSGID = true; # Ignore SUID/SGID bits on execution
 
         # Directories managed by systemd
-        StateDirectory = lib.baseNameOf cfg.stateDir; # e.g., "eris"
-        CacheDirectory = lib.baseNameOf cfg.cacheDir; # e.g., "eris"
+        StateDirectory = baseNameOf cfg.stateDir; # e.g., "eris"
+        CacheDirectory = baseNameOf cfg.cacheDir; # e.g., "eris"
         StateDirectoryMode = "0750";
         CacheDirectoryMode = "0750";
 
@@ -362,15 +363,15 @@ in {
         mkdir -p ${cfg.stateDir}/conf ${cfg.dataDir} ${corporaDir} ${scriptsDir}
 
         # Ensure ownership is correct for all relevant dirs managed by systemd or created here
-        ${chownCmd} /var/lib/${lib.baseNameOf cfg.stateDir} \
-                    /var/cache/${lib.baseNameOf cfg.cacheDir} \
+        ${chownCmd} /var/lib/${baseNameOf cfg.stateDir} \
+                    /var/cache/${baseNameOf cfg.cacheDir} \
                     ${cfg.stateDir}/conf \
                     ${cfg.dataDir} \
                     ${corporaDir} \
                     ${scriptsDir}
         # Copy declarative files
-        ${lib.toString copyCorporaCmds}
-        ${lib.toString copyLuaScriptCmds}
+        ${toString copyCorporaCmds}
+        ${toString copyLuaScriptCmds}
       '';
     };
   };