nix: fix license, it's LGPL-2.1 now rather than MIT.

srcpkgs/nix/template

@@ -1,7 +1,7 @@
 # Template file for 'nix'
 pkgname=nix
 version=1.8
-revision=9
+revision=10
 build_style=gnu-configure
 # Use /nix/var as suggested by the official Manual.
 configure_args="--localstatedir=/nix/var"
@@ -31,14 +31,12 @@ make_dirs="
 	/nix/store 1775 root nixbld"
 short_desc="A purely functional package manager"
 maintainer="Juan RP <xtraeme@voidlinux.eu>"
-license="MIT"
+license="LGPL-2.1"
 homepage="http://nixos.org/nix/"
 distfiles="http://nixos.org/releases/nix/nix-${version}/nix-${version}.tar.xz"
 checksum=a30a5e801bc1cb1019cbc3456d961a307c45c9c588b8692cf1293ea6588ef01c
 
 post_install() {
-	vlicense COPYING LICENSE
-
 	vmkdir etc/nix
 	# Remove unused stuff.
 	rm -rf ${DESTDIR}/usr/include ${DESTDIR}/nix