dev-python/pycson: Prepare for rename

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/pycson/pycson-0.8-r4.ebuild

@@ -8,6 +8,7 @@ PYTHON_COMPAT=( python3_{10..12} )
 
 inherit distutils-r1
 
+MY_P=pycson-${PV}
 DESCRIPTION="A python parser for the Coffeescript Object Notation (CSON)"
 HOMEPAGE="
 	https://github.com/avakar/pycson/
@@ -15,8 +16,9 @@ HOMEPAGE="
 "
 SRC_URI="
 	https://github.com/avakar/pycson/archive/${PV}.tar.gz
-		-> ${P}.gh.tar.gz
+		-> ${MY_P}.gh.tar.gz
 "
+S=${WORKDIR}/${MY_P}
 
 LICENSE="MIT"
 SLOT="0"