selftest/eSDK.py: fix sstate dir not found error

Fix the error below when SSTATE_DIR is not "${BUILDDIR}/sstate-cache".

  FileNotFoundError: [Errno 2] No such file or directory: '/xxx/../sstate-cache'

(From OE-Core rev: 785f0343d04c1684363b5289a3012cf7e1caa95f)

(From OE-Core rev: 9d04fe3a0ce7eb418cd48438e1699825904e2dfb)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/lib/oeqa/selftest/eSDK.py b/meta/lib/oeqa/selftest/eSDK.py
index 9d5c680948..b43a452ac1 100644
--- a/meta/lib/oeqa/selftest/eSDK.py
+++ b/meta/lib/oeqa/selftest/eSDK.py
@@ -55,7 +55,7 @@ class oeSDKExtSelfTest(oeSelfTest):
     @classmethod
     def setUpClass(cls):
         # Start to serve sstate dir
-        sstate_dir = os.path.join(os.environ['BUILDDIR'], 'sstate-cache')
+        sstate_dir = get_bb_var('SSTATE_DIR')
         cls.http_service = HTTPService(sstate_dir)
         cls.http_service.start()