minor coveralls fix

diff --git a/ci/coveralls.sh b/ci/coveralls.sh
index 66c32b9e25501c11ebc97429edb98774eec86140..a6c5f05dbbfb1de5cb45afef59c7ef4c5a112a4b 100755 (executable)
--- a/ci/coveralls.sh
+++ b/ci/coveralls.sh
@@ -2,7 +2,7 @@
 
 set -x
 
-sudo pip install cpp-coveralls
+sudo -H pip install cpp-coveralls
 
 cd src