diff --git a/docs/Makefile b/docs/Makefile
index 31655dd..236359e 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -20,6 +20,10 @@ endif
 help:
 	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
+postprocess:
+	@echo "Running postprocessing script..."
+	python ./postprocess.py
+
 clean:
 	rm -rf $(BUILDDIR)/* $(AUTODOCDIR)
 
@@ -27,3 +31,4 @@ clean:
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
 	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+	@$(MAKE) postprocess
diff --git a/tox.ini b/tox.ini
index 0057cf4..4667724 100644
--- a/tox.ini
+++ b/tox.ini
@@ -56,6 +56,7 @@ commands =
 
 
 [testenv:{docs,doctests,linkcheck}]
+allowlist_externals = make
 description =
     docs: Invoke sphinx-build to build the docs
     doctests: Invoke sphinx-build to run doctests
@@ -72,8 +73,7 @@ deps =
     -r {toxinidir}/docs/requirements.txt
     # ^  requirements.txt shared with Read The Docs
 commands =
-    sphinx-build --color -b {env:BUILD} -d "{env:BUILDDIR}/doctrees" "{env:DOCSDIR}" "{env:BUILDDIR}/{env:BUILD}" {posargs}
-    python docs/postprocess.py
+    make -C {toxinidir}/docs html
 
 [testenv:publish]
 description =