Merge pull request #212170 from alyssais/libcIconv

libiconv: use libc header on NetBSD

pkgs/os-specific/bsd/netbsd/default.nix

···
   mkDerivation = lib.makeOverridable (attrs: let
     stdenv' = if attrs.noCC or false then stdenvNoCC else stdenv;
   in stdenv'.mkDerivation ({
-    name = "${attrs.pname or (baseNameOf attrs.path)}-netbsd-${attrs.version}";
+    pname = "${attrs.pname or (baseNameOf attrs.path)}-netbsd";
+    inherit (attrs) version;
     src = fetchNetBSD attrs.path attrs.version attrs.sha256;
 
     extraPaths = [ ];

pkgs/top-level/all-packages.nix

···
   # We also provide `libiconvReal`, which will always be a standalone libiconv,
   # just in case you want it regardless of platform.
   libiconv =
-    if lib.elem stdenv.hostPlatform.libc ["glibc" "musl" "wasilibc"]
-      then glibcIconv (if stdenv.hostPlatform != stdenv.buildPlatform
+    if lib.elem stdenv.hostPlatform.libc [ "glibc" "musl" "nblibc" "wasilibc" ]
+      then libcIconv (if stdenv.hostPlatform != stdenv.buildPlatform
         then libcCross
         else stdenv.cc.libc)
     else if stdenv.hostPlatform.isDarwin
       then darwin.libiconv
-    else if stdenv.hostPlatform.isNetBSD
-      then null
     else libiconvReal;
 
-  glibcIconv = libc: let
+  libcIconv = libc: let
     inherit (libc) pname version;
     libcDev = lib.getDev libc;
   in runCommand "${pname}-iconv-${version}" { strictDeps = true; } ''