Simpler coverage command

Author: rhpvorderman

tox.ini

@@ -9,7 +9,7 @@ passenv=
     PYTHON_ISAL_LINK_DYNAMIC
 commands =
     # Create HTML coverage report for humans and xml coverage report for external services.
-    coverage run --source={envsitepackagesdir}/isal -m py.test tests
+    coverage run --source=isal -m py.test tests
     coverage html
     coverage xml
 
@@ -24,7 +24,7 @@ setenv=
     CYTHON_COVERAGE=true
 commands =
     # Create HTML coverage report for humans and xml coverage report for external services.
-    coverage run --source={envsitepackagesdir}/isal -m py.test tests
+    coverage run --source=isal -m py.test tests
     coverage html
     coverage xml