diff -Nru python-escript-5.0/debian/changelog python-escript-5.0/debian/changelog
--- python-escript-5.0/debian/changelog	2017-07-03 20:02:53.000000000 +0000
+++ python-escript-5.0/debian/changelog	2017-11-02 11:29:48.000000000 +0000
@@ -1,3 +1,10 @@
+python-escript (5.0-4+rpi1) buster-staging; urgency=medium
+
+  * Disable Werror. (Closes: 878496)
+  * Fix clean target.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Thu, 02 Nov 2017 11:29:48 +0000
+
 python-escript (5.0-4) unstable; urgency=medium
 
   [ Joel Fenwick ]
diff -Nru python-escript-5.0/debian/patches/disable-werror python-escript-5.0/debian/patches/disable-werror
--- python-escript-5.0/debian/patches/disable-werror	1970-01-01 00:00:00.000000000 +0000
+++ python-escript-5.0/debian/patches/disable-werror	2017-11-02 11:29:39.000000000 +0000
@@ -0,0 +1,29 @@
+Description: Disable Werror
+Author: Peter Michael Green <plugwash@debian.org>
+Bug-Debian: https://bugs.debian.org/878496
+
+---
+The information above should follow the Patch Tagging Guidelines, please
+checkout http://dep.debian.net/deps/dep3/ to learn about the format. Here
+are templates for supplementary fields that you might want to add:
+
+Origin: <vendor|upstream|other>, <url of original patch>
+Bug: <url in upstream bugtracker>
+Bug-Debian: https://bugs.debian.org/<bugnumber>
+Bug-Ubuntu: https://launchpad.net/bugs/<bugnumber>
+Forwarded: <no|not-needed|url proving that it has been forwarded>
+Reviewed-By: <name and email of someone who approved the patch>
+Last-Update: 2017-11-02
+
+--- python-escript-5.0.orig/scons/templates/sid_options.py
++++ python-escript-5.0/scons/templates/sid_options.py
+@@ -63,6 +63,9 @@ boost_libs = [p2name[3:-3]]
+ boost_py2_libs = [p2name[3:-3]]
+ boost_py3_libs = [p3name[3:-3]]
+ 
++# Disable Werror
++werror = False
++
+ from site_init import getdebbuildflags
+ # Now we add the debian build flags
+ debstuff = getdebbuildflags()
diff -Nru python-escript-5.0/debian/patches/series python-escript-5.0/debian/patches/series
--- python-escript-5.0/debian/patches/series	2017-01-05 21:34:39.000000000 +0000
+++ python-escript-5.0/debian/patches/series	2017-11-02 11:22:19.000000000 +0000
@@ -2,3 +2,4 @@
 rootintar
 fixopenmpiconf
 fixFTBFS.patch
+disable-werror
diff -Nru python-escript-5.0/debian/rules python-escript-5.0/debian/rules
--- python-escript-5.0/debian/rules	2017-07-03 20:02:18.000000000 +0000
+++ python-escript-5.0/debian/rules	2017-11-02 11:29:48.000000000 +0000
@@ -48,6 +48,8 @@
 	rm -rf $(CURDIR)/debian/tmp/*
 	rm -f debian/files
 	rm -f debian/substvars
+	rm -f site_scons/*.pyc
+	rm -f *test.sh
 	dh_clean
 
 override_dh_installchangelogs: