buildFHSEnv: simplify pname/name logic

pkgs/build-support/build-fhsenv-bubblewrap/default.nix

@@ -12,10 +12,13 @@
 }:
 
 {
+  pname ? throw "You must provide either `name` or `pname`",
+  version ? throw "You must provide either `name` or `version`",
+  name ? "${pname}-${version}",
   runScript ? "bash",
   nativeBuildInputs ? [ ],
   extraInstallCommands ? "",
-  executableName ? args.pname or args.name,
+  executableName ? args.pname or name,
   meta ? { },
   passthru ? { },
   extraPreBwrapCmds ? "",
@@ -31,8 +34,6 @@
   ...
 }@args:
 
-assert (!args ? pname || !args ? version) -> (args ? name); # You must provide name if pname or version (preferred) is missing.
-
 let
   inherit (lib)
     concatLines
@@ -49,7 +50,6 @@ let
   # explicit about which package set it's coming from.
   inherit (pkgsHostTarget) pkgsi686Linux;
 
-  name = args.name or "${args.pname}-${args.version}";
   # we don't know which have been supplied, and want to avoid defaulting missing attrs to null. Passed into runCommandLocal
   nameAttrs = lib.filterAttrs (
     key: value: