nix: update to 2.3.3.

srcpkgs/nix/template

@@ -1,7 +1,7 @@
 # Template file for 'nix'
 pkgname=nix
-version=2.3.2
-revision=2
+version=2.3.3
+revision=1
 build_style=gnu-configure
 # Use /nix/var as suggested by the official Manual.
 configure_args="--localstatedir=/nix/var --with-sandbox-shell=/bin/sh"
@@ -16,7 +16,9 @@ license="LGPL-2.1-or-later"
 homepage="https://nixos.org/nix/"
 changelog="https://nixos.org/releases/${pkgname}/${pkgname}-${version}/manual/#sec-relnotes"
 distfiles="https://nixos.org/releases/${pkgname}/${pkgname}-${version}/${pkgname}-${version}.tar.xz"
-checksum=9fea4b52db0b296dcf05d36f7ecad9f48396af3a682bb21e31f8d04c469beef8
+checksum=332fffb8dfc33eab854c136ef162a88cec15b701def71fa63714d160831ba224
+
+CXXFLAGS="-Wno-deprecated-declarations"
 
 # Default configuration file.
 conf_files="/etc/nix/nix.conf"