diff -Nru sdpa-7.3.14+dfsg/debian/changelog sdpa-7.3.14+dfsg/debian/changelog
--- sdpa-7.3.14+dfsg/debian/changelog	2020-03-14 00:00:00.000000000 +0000
+++ sdpa-7.3.14+dfsg/debian/changelog	2020-11-05 17:10:20.000000000 +0000
@@ -1,3 +1,11 @@
+sdpa (7.3.14+dfsg-1+rpi1) bullseye-staging; urgency=medium
+
+  * Use only the first two parts of version number when generating libmumps-seq dependency
+    (Closes: 973825)
+  * Bump build-dependency on libmumps-seq-dev to >= 5.3.4
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Thu, 05 Nov 2020 17:10:20 +0000
+
 sdpa (7.3.14+dfsg-1) unstable; urgency=low
 
    * New upstream
diff -Nru sdpa-7.3.14+dfsg/debian/control sdpa-7.3.14+dfsg/debian/control
--- sdpa-7.3.14+dfsg/debian/control	2020-03-14 00:00:00.000000000 +0000
+++ sdpa-7.3.14+dfsg/debian/control	2020-11-05 17:10:20.000000000 +0000
@@ -4,7 +4,7 @@
 Maintainer: Makoto Yamashita <Makoto.Yamashita@is.titech.ac.jp>
 Build-Depends: cdbs, debhelper (>= 7), 
    automake, autotools-dev, autoconf, gfortran,
-   libopenblas-pthread-dev, libmumps-seq-dev, libscotch-dev, liboctave-dev
+   libopenblas-pthread-dev, libmumps-seq-dev (>=5.3.4), libscotch-dev, liboctave-dev
 Standards-Version: 4.1.1
 Homepage: http://sdpa.sourceforge.net/
 
diff -Nru sdpa-7.3.14+dfsg/debian/rules sdpa-7.3.14+dfsg/debian/rules
--- sdpa-7.3.14+dfsg/debian/rules	2020-03-14 00:00:00.000000000 +0000
+++ sdpa-7.3.14+dfsg/debian/rules	2020-11-05 17:09:38.000000000 +0000
@@ -38,7 +38,7 @@
 DEB_CONFIGURE_EXTRA_FLAGS += --with-mumps-libs=$(MUMPS_LIBS)
 
 
-LIBMUMPS_VER := $(shell dpkg --status libmumps-seq-dev | awk '/^Version:/ {print $$2}' |cut -f 1 -d "-")
+LIBMUMPS_VER := $(shell dpkg --status libmumps-seq-dev | awk '/^Version:/ {print $$2}' |cut -f 1 -d "-" | cut -d . -f 1-2)
 DEB_DH_GENCONTROL_ARGS_ALL = -- -Vmumps-seq:Version=$(LIBMUMPS_VER)
 
 SDPA_DIR=$(CURDIR)/debian/sdpa