ion: use cargo buildstyle

srcpkgs/ion/template

@@ -1,8 +1,8 @@
 # Template file for 'ion'
 pkgname=ion
 version=1.0.5
-revision=1
-hostmakedepends="cargo rust"
+revision=2
+build_style=cargo
 register_shell="/bin/ion"
 short_desc="The Ion Shell, written in Rust"
 maintainer="Muhammad Herdiansyah <herdiansyah@opmbx.org>"
@@ -12,11 +12,6 @@ homepage="https://github.com/redox-os/ion"
 distfiles="${homepage}/archive/${version}/${pkgname}-${version}.tar.gz"
 checksum="7c7f696060a82669cb9c73cf0ec1d07d4ffefbfd54fc60acad0179ca3f46716d"
 
-do_build() {
-	cargo build --release
-}
-
-do_install() {
-	vbin target/release/ion
+post_install() {
 	vlicense LICENSE
 }