debian/changelog

+fiona (1.8.9-2) unstable; urgency=medium
+
+  * Team upload.
+
+  [ Bas Couwenberg ]
+  * Apply patch by Matthias Klose to fix FTBFS with multiple python3 versions.
+    (closes: #943513)
+
+  [ Matthias Klose ]
+  * Call python{version} -m sphinx to build the documentation.
+  * Build the docs in a temporary directory.
+
+ -- Bas Couwenberg <sebastic@debian.org>  Fri, 25 Oct 2019 19:55:22 +0200
+
 fiona (1.8.9-1) unstable; urgency=medium
 
   * Team upload.

debian/rules

@@ -11,7 +11,7 @@ BUILD_DATE=$(shell LC_ALL=C date -u "+%B %d, %Y" -d "@$(SOURCE_DATE_EPOCH)")
 DEB_BUILD_ARCH ?= $(shell dpkg-architecture -qDEB_BUILD_ARCH)
 
 export PYBUILD_NAME=fiona
-export PYBUILD_AFTER_BUILD_python3 = PYTHONPATH={build_dir} http_proxy='127.0.0.1:9' /usr/share/sphinx/scripts/python3/sphinx-build -N -bhtml -D today="$(BUILD_DATE)" docs/ build/html
+export PYBUILD_AFTER_BUILD_python3 = mkdir -p doc-build && cd doc-build && PYTHONPATH={build_dir} http_proxy='127.0.0.1:9' python{version} -m sphinx -N -bhtml -D today="$(BUILD_DATE)" ../docs/ ../build/html
 export PYBUILD_TEST_PYTEST=1
 export PYBUILD_BEFORE_TEST=cp -r {dir}/tests {build_dir}
 export PYBUILD_AFTER_TEST=rm -rf {build_dir}/tests
@@ -44,6 +44,7 @@ export PYBUILD_TEST_ARGS=--ignore tests/test_bytescollection.py \
 override_dh_clean:
 	dh_clean
 	rm -rf fiona/*.so gdal-config.txt fiona/*.c VERSION.txt fiona/*.cpp Fiona.egg-info/
+	rm -rf doc-build
 
 override_dh_auto_test:
 # Ignore test failures on problematic architectures only