[PATCH] python-utils-r1.eclass: epytest, fix jobserver USE-dep check

Fix the dev-python/pytest-jobserver USE dependency check not to rely
on PYTHON_USEDEP being declared (which was too restrictive anyway).
Instead, check for the implementation used via EPYTHON, using similar
logic to python_check_deps().

Signed-off-by: Michał Górny <[email protected]>
---
 eclass/python-utils-r1.eclass | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/eclass/python-utils-r1.eclass b/eclass/python-utils-r1.eclass
index 468373dac37d4..5313e41a420f7 100644
--- a/eclass/python-utils-r1.eclass
+++ b/eclass/python-utils-r1.eclass
@@ -1606,7 +1606,8 @@ epytest() {
 			)
 
 			if [[ ${MAKEFLAGS} == *--jobserver-auth=* ]]; then
-				if has_version "dev-python/pytest-jobserver[${PYTHON_USEDEP}]"
+				local usedep="python_targets_${EPYTHON/./_}(-)"
+				if has_version "dev-python/pytest-jobserver[${usedep}]"
 				then
 					args+=( -p jobserver )
 				elif [[ ! ${_EPYTEST_JOBSERVER_WARNED} ]]; then