On Sun, Apr 17, 2016 at 10:50:52PM +0200, Hartmut Goebel wrote: > * gnu/packages/python.scm (python-sqlparse) (python2-sqlparse): > New functions.
[...] > + (build-system python-build-system) > + (arguments > + `(#:phases > + (modify-phases %standard-phases > + (replace 'check > + (lambda* _ > + ;; setup.py-integrated 2to3 only affects the build files, but > + ;; py.test is using the source files. So we need to convert them > + ;; manually. > + (if (zero? (system* "python3")) > + (system* "2to3" "--no-diff" "-wn" "sqlparse" "tests") > + #t) Is this running the python3 interpreter with no arguments in order to see if it exists, and then doing 2to3 if it does?