diff -Nru pyregion-2.0/debian/changelog pyregion-2.0/debian/changelog
--- pyregion-2.0/debian/changelog	2019-08-06 11:22:34.000000000 +0000
+++ pyregion-2.0/debian/changelog	2020-03-29 22:50:38.000000000 +0000
@@ -1,3 +1,10 @@
+pyregion (2.0-9+rpi1) bullseye-staging; urgency=medium
+
+  * Only delete 'h5py' and 'scipy' from intersphinx_mapping if they
+    actually exist in there.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Sun, 29 Mar 2020 22:50:38 +0000
+
 pyregion (2.0-9) unstable; urgency=medium
 
   * Add dependency (libjs-sphinxdoc) to fix broken symlinks
diff -Nru pyregion-2.0/debian/patches/fix-doc-build.patch pyregion-2.0/debian/patches/fix-doc-build.patch
--- pyregion-2.0/debian/patches/fix-doc-build.patch	1970-01-01 00:00:00.000000000 +0000
+++ pyregion-2.0/debian/patches/fix-doc-build.patch	2020-03-29 22:50:38.000000000 +0000
@@ -0,0 +1,18 @@
+Description:  Only delete 'h5py' and 'scipy' from intersphinx_mapping if they actually exist in there.
+Author: Peter Michael Green <plugwash@raspbian.org>
+
+--- pyregion-2.0.orig/docs/conf.py
++++ pyregion-2.0/docs/conf.py
+@@ -54,8 +54,10 @@ setup_cfg = dict(conf.items('metadata'))
+ # -- General configuration ----------------------------------------------------
+ 
+ # Remove intersphinx mappings we don't need (for faster docs build)
+-del intersphinx_mapping['h5py']
+-del intersphinx_mapping['scipy']
++if 'h5py' in intersphinx_mapping:
++	del intersphinx_mapping['h5py']
++if 'scipy' in intersphinx_mapping:
++	del intersphinx_mapping['scipy']
+ 
+ 
+ # If your documentation needs a minimal Sphinx version, state it here.
diff -Nru pyregion-2.0/debian/patches/series pyregion-2.0/debian/patches/series
--- pyregion-2.0/debian/patches/series	2019-07-29 14:30:26.000000000 +0000
+++ pyregion-2.0/debian/patches/series	2020-03-29 22:50:38.000000000 +0000
@@ -1,3 +1,4 @@
 no_auto_use_astropy_helpers.patch
 replace_asscalar.patch
 Fix-import-failure-from-astropy.tests-on-astropy-3.2.patch
+fix-doc-build.patch