python3Packages.tempest: use correct interpreter

pkgs/development/python-modules/tempest/default.nix

@@ -24,7 +24,7 @@
 , hacking
 , oslotest
 , bash
-, python3
+, python
 }:
 
 buildPythonApplication rec {
@@ -76,8 +76,8 @@ buildPythonApplication rec {
     # Tests expect these applications available as such.
     mkdir -p bin
     export PATH="$PWD/bin:$PATH"
-    printf '#!${bash}/bin/bash\nexec ${python3.interpreter} -m tempest.cmd.main "$@"\n' > bin/tempest
-    printf '#!${bash}/bin/bash\nexec ${python3.interpreter} -m tempest.cmd.subunit_describe_calls "$@"\n' > bin/subunit-describe-calls
+    printf '#!${bash}/bin/bash\nexec ${python.interpreter} -m tempest.cmd.main "$@"\n' > bin/tempest
+    printf '#!${bash}/bin/bash\nexec ${python.interpreter} -m tempest.cmd.subunit_describe_calls "$@"\n' > bin/subunit-describe-calls
     chmod +x bin/*
 
     stestr --test-path tempest/tests run -e <(echo "