--- doc/Makefile.orig	2020-01-30 17:34:31 UTC
+++ doc/Makefile
@@ -3,7 +3,7 @@
 
 # You can set these variables from the command line.
 SPHINXOPTS    =
-SPHINXBUILD   = sphinx-build
+SPHINXBUILD   = sphinx-build-${PYTHON_VER}
 PAPER         =
 BUILDDIR      = build
 
@@ -17,9 +17,9 @@ I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) s
 YAML_DOC_INPUT=../conf/cassandra.yaml
 YAML_DOC_OUTPUT=source/configuration/cassandra_config_file.rst
 
-MAKE_CASSANDRA_YAML = python convert_yaml_to_rst.py $(YAML_DOC_INPUT) $(YAML_DOC_OUTPUT)
+MAKE_CASSANDRA_YAML = ${PYTHON_CMD} convert_yaml_to_rst.py $(YAML_DOC_INPUT) $(YAML_DOC_OUTPUT)
 
-GENERATE_NODETOOL_DOCS = python gen-nodetool-docs.py
+GENERATE_NODETOOL_DOCS = ${PYTHON_CMD} gen-nodetool-docs.py
 
 WEB_SITE_PRESENCE_FILE='source/.build_for_website'