diff -Nru python3.8-3.8.10/debian/changelog python3.8-3.8.10/debian/changelog
--- python3.8-3.8.10/debian/changelog	2021-06-02 10:49:15.000000000 +0000
+++ python3.8-3.8.10/debian/changelog	2021-06-02 10:49:15.000000000 +0000
@@ -1,12 +1,13 @@
-python3.8 (3.8.10-0ubuntu1~20.10) groovy-proposed; urgency=medium
+python3.8 (3.8.10-0ubuntu1~20.10.1) groovy-proposed; urgency=medium
 
-  * SRU: LP: #1928057. Backport Python 3.8.10 to 20.04 LTS.
+  * SRU: LP: #1928057. Backport Python 3.8.10 to 20.10.
   * Python 3.8.10 release.
   * Refresh patches.
   * Call python with -S when checking the minimal set of modules.
   * Try to detect whether python3-venv is missing (Stefano Rivera).
     Addresses: #977887.
   * Build a python3.8-full package.
+  * Don't configure with --with-system-libmpdec for the backport.
 
  -- Matthias Klose <doko@ubuntu.com>  Wed, 02 Jun 2021 12:49:15 +0200
 
diff -Nru python3.8-3.8.10/debian/control python3.8-3.8.10/debian/control
--- python3.8-3.8.10/debian/control	2021-05-11 10:07:41.000000000 +0000
+++ python3.8-3.8.10/debian/control	2021-06-02 10:49:15.000000000 +0000
@@ -11,7 +11,6 @@
   libgdbm-dev, libdb-dev,
   tk-dev, blt-dev (>= 2.4z), libssl-dev,
   libexpat1-dev,
-  libmpdec-dev (>= 2.4),
   libbluetooth-dev [linux-any] <!pkg.python3.8.nobluetooth>,
   locales-all,
   libsqlite3-dev, libffi-dev (>= 3.0.5) [!or1k !avr32],
diff -Nru python3.8-3.8.10/debian/control.in python3.8-3.8.10/debian/control.in
--- python3.8-3.8.10/debian/control.in	2021-05-11 10:04:39.000000000 +0000
+++ python3.8-3.8.10/debian/control.in	2021-06-02 10:49:15.000000000 +0000
@@ -10,7 +10,6 @@
   libgdbm-dev, libdb-dev,
   tk-dev, blt-dev (>= 2.4z), libssl-dev,
   libexpat1-dev,
-  libmpdec-dev (>= 2.4),
   libbluetooth-dev [linux-any] <!pkg.@PVER@.nobluetooth>,
   locales-all,
   libsqlite3-dev, libffi-dev (>= 3.0.5) [!or1k !avr32],
diff -Nru python3.8-3.8.10/debian/rules python3.8-3.8.10/debian/rules
--- python3.8-3.8.10/debian/rules	2021-05-11 10:04:21.000000000 +0000
+++ python3.8-3.8.10/debian/rules	2021-06-02 10:49:15.000000000 +0000
@@ -376,7 +376,8 @@
 		--without-ensurepip \
 		--with-system-expat \
 		--with-dtrace \
-		--with-system-libmpdec \
+
+#		--with-system-libmpdec \
 
 ifneq (,$(filter $(DEB_HOST_ARCH), avr32 or1k))
   common_configure_args += --without-ffi