diff -Nru mdadm-4.1~rc1/debian/changelog mdadm-4.1~rc1/debian/changelog
--- mdadm-4.1~rc1/debian/changelog	2018-05-15 11:10:33.000000000 +0000
+++ mdadm-4.1~rc1/debian/changelog	2018-05-22 13:26:59.000000000 +0000
@@ -1,3 +1,12 @@
+mdadm (4.1~rc1-2) unstable; urgency=medium
+
+  * Install identical udev rules into d-i installer udeb, as used in the
+    installed system. Specifically, post-processed rules with full path to
+    mdadm binary subsituted, instead of installing useless rules with the
+    template variable BINDIR. LP: #1705215
+
+ -- Dimitri John Ledkov <xnox@ubuntu.com>  Tue, 22 May 2018 14:26:59 +0100
+
 mdadm (4.1~rc1-1) unstable; urgency=medium
 
   * New upstream release.
diff -Nru mdadm-4.1~rc1/debian/rules mdadm-4.1~rc1/debian/rules
--- mdadm-4.1~rc1/debian/rules	2018-05-15 11:10:33.000000000 +0000
+++ mdadm-4.1~rc1/debian/rules	2018-05-22 13:25:01.000000000 +0000
@@ -66,10 +66,10 @@
 	install -Dm0755 debian/bugscript $(DESTDIR)/usr/share/bug/mdadm/script
 	install -Dm0755 udeb/mdadm $(DESTDIR_UDEB)/sbin/mdadm
 	install -Dm0755 udeb/mdmon $(DESTDIR_UDEB)/sbin/mdmon
-	install -Dm0644 udev-md-raid-arrays.rules $(DESTDIR_UDEB)/lib/udev/rules.d/63-md-raid-arrays.rules
+	install -Dm0644 $(DESTDIR)/lib/udev/rules.d/63-md-raid-arrays.rules $(DESTDIR_UDEB)/lib/udev/rules.d/63-md-raid-arrays.rules
 	install -Dm0644 debian/mdadm-shutdown.service $(DESTDIR)/lib/systemd/system/mdadm-shutdown.service
 ifeq ($(shell dpkg-vendor --derives-from Ubuntu && echo yes), yes)
-	install -Dm0644 udev-md-raid-assembly.rules $(DESTDIR_UDEB)/lib/udev/rules.d/64-md-raid-assembly.rules
+	install -Dm0644 $(DESTDIR)/lib/udev/rules.d/64-md-raid-assembly.rules $(DESTDIR_UDEB)/lib/udev/rules.d/64-md-raid-assembly.rules
 	install -Dm0644 debian/source_mdadm.py $(DESTDIR)/usr/share/apport/package-hooks/source_mdadm.py
 endif