diff --git a/dev-python/pypy-bin/pypy-bin-5.9.0-r1.ebuild b/dev-python/pypy-bin/pypy-bin-5.9.0-r2.ebuild
similarity index 99%
rename from dev-python/pypy-bin/pypy-bin-5.9.0-r1.ebuild
rename to dev-python/pypy-bin/pypy-bin-5.9.0-r2.ebuild
index b33c85d2d3032..8c3b3d419da85 100644
--- a/dev-python/pypy-bin/pypy-bin-5.9.0-r1.ebuild
+++ b/dev-python/pypy-bin/pypy-bin-5.9.0-r2.ebuild
@@ -171,6 +171,8 @@ src_install() {
 	doexe pypy-c libpypy-c.so
 	pax-mark m "${ED%/}${dest}/pypy-c" "${ED%/}${dest}/libpypy-c.so"
 	insinto "${dest}"
+	# preserve mtimes to avoid obsoleting caches
+	insopts -p
 	doins -r include lib_pypy lib-python
 	dosym ../$(get_libdir)/pypy/pypy-c /usr/bin/pypy
 	dodoc README.rst