games-engines/boxtron: ebuild improvements

- use the correct python eclass
- move sed command to correct build phase
- fix shebangs of python scripts

Package-Manager: Portage-2.3.103, Repoman-2.3.23
Signed-off-by: Andreas Zuber <a.zuber@gmx.ch>

games-engines/boxtron/boxtron-0.5.4-r1.ebuild

@@ -3,6 +3,9 @@
 
 EAPI=7
 
+PYTHON_COMPAT=( python3_{6,7,8} )
+inherit python-single-r1
+
 DESCRIPTION="Steam Play compatibility tool to run DOS games using native Linux DOSBox"
 HOMEPAGE="https://github.com/dreamer/boxtron/"
 SRC_URI="https://github.com/dreamer/boxtron/archive/v${PV}.tar.gz -> ${P}.tar.gz"
@@ -11,22 +14,29 @@ LICENSE="GPL-2"
 SLOT="0"
 KEYWORDS="~amd64 ~x86"
 IUSE=""
+REQUIRED_USE="${PYTHON_REQUIRED_USE}"
 
 BDEPEND="
 	sys-devel/make
 	app-arch/tar"
 
 RDEPEND="
-	>=dev-lang/python-3.5.0
+	${PYTHON_DEPS}
 	>=games-emulation/dosbox-staging-0.75.0
 	media-sound/fluid-soundfont
 	media-sound/timidity++
 	sys-fs/inotify-tools"
 
+src_prepare() {
+	default
+	sed -i '/README.md/d' Makefile || die "sed failed"
+}
+
 src_compile() { :; }
 
 src_install() {
-	sed -i '/README.md/d' Makefile || die "sed failed"
 	emake DESTDIR="${D}" prefix=/usr install || die "died running emake"
 	dodoc README.md
+	python_fix_shebang "${D}"/usr/share/boxtron/run-dosbox
+	python_fix_shebang "${D}"/usr/bin/install-gog-game
 }