chore: upgrade to 21.05

packages/iolanguage.nix

@@ -1,4 +1,4 @@
-{ stdenv, cmake, python3, fetchFromGitHub }:
+{ lib, stdenv, cmake, python3, fetchFromGitHub }:
 stdenv.mkDerivation rec {
   version = "2017.09.06";
   name = "iolanguage-${version}";
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
     cmake -DCMAKE_INSTALL_PREFIX=$out/ ..
     make all
   '';
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "https://iolanguage.org/";
     description =
       "Io programming language. Inspired by Self, Smalltalk and LISP.";

packages/libcoap.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   preConfigure = "./autogen.sh";
   configureFlags = [ "--disable-documentation" "--disable-shared" ]
     ++ lib.optional tls "--enable-dtls";
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "https://github.com/obgm/libcoap";
     description = "A CoAP (RFC 7252) implementation in C";
     platforms = platforms.linux;

packages/scripts/daybook.nix

@@ -1,4 +1,4 @@
-{ stdenv, makeWrapper, pandoc, fetchFromGitHub }:
+{ lib, stdenv, makeWrapper, pandoc, fetchFromGitHub }:
 stdenv.mkDerivation {
   name = "daybook";
   src = fetchFromGitHub {
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
     install daybook $out/bin
     wrapProgram $out/bin/daybook --prefix PATH ":" ${pandoc}/bin ;
   '';
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "https://github.com/kmein/daybook";
     description = "A diary writing utility in sh";
     license = licenses.mit;

packages/scripts/nav.nix

@@ -1,4 +1,4 @@
-{ fetchFromGitHub, stdenv, fzf }:
+{ lib, fetchFromGitHub, stdenv, fzf }:
 stdenv.mkDerivation rec {
   name = "nav";
   version = "8da22b1";
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   '';
   propagatedBuildInputs = [ fzf ];
   meta = {
-    maintainer = [ stdenv.lib.maintainers.kmein ];
+    maintainer = [ lib.maintainers.kmein ];
     description = "JSON data structure navigator";
     homepage = "https://github.com/huntrar/nav";
   };

packages/scripts/pls.nix

@@ -16,7 +16,7 @@ let
     ${pkgs.nur.repos.mic92.untilport}/bin/untilport ${irc.host} ${toString irc.port} && \
     ${pkgs.nur.repos.mic92.irc-announce}/bin/irc-announce \
       ${irc.host} ${toString irc.port} ${irc.nick} ${lib.escapeShellArg irc.channel} ${toString (if irc.tls then 1 else 0)} \
-      "$*" 2>/dev/null
+      "$*"
   '';
 
   messages.good = [