SPHINXBUILD = sphinx-build
DOCBUILDDIR := $(dir)/_build
-mkdocdeps := python $(srcdir)/$(dir)/mkdocdeps.py
+mkdocdeps := $(PYTHON) $(srcdir)/$(dir)/mkdocdeps.py
# Internal variables.
ALLSPHINXOPTS := -d $(DOCBUILDDIR)/doctrees $(SPHINXOPTS) $(srcdir)/$(dir)