diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f99d1e0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,3 @@
+rear-%-clean.tar.gz: rear-%.tar.gz
+	set -o pipefail; gunzip -c $< | tar --delete "rear-"$*"/doc/rear-release-notes.txt" -f - | gzip -c - > $@.tmp
+	mv $@.tmp $@
diff --git a/rear.spec b/rear.spec
index 385604a..4951585 100644
--- a/rear.spec
+++ b/rear.spec
@@ -7,15 +7,20 @@ Release: 11%{?dist}
 Summary: Relax-and-Recover is a Linux disaster recovery and system migration tool
 URL: https://relax-and-recover.org
 
-# doc/rear-release-notes.txt - CC-BY-ND-3.0
-# the rest - GPL-3.0-or-later
-License: GPL-3.0-or-later AND CC-BY-ND-3.0
+License: GPL-3.0-or-later
 
-Source0: https://github.com/rear/rear/archive/%{version}.tar.gz#/rear-%{version}.tar.gz
+#Source0: https://github.com/rear/rear/archive/%%{version}.tar.gz#/rear-%%{version}.tar.gz
+Source0: rear-%{version}-clean.tar.gz
 # Add cronjob and systemd timer as documentation
 Source1: rear.cron
 Source2: rear.service
 Source3: rear.timer
+# doc/rear-release-notes.txt is CC-BY-ND-3.0, which is not an allowed license
+# for documentation. Therefore we use this Makefile to remove the file
+# before shipping it.
+# Download the upstream tarball and invoke "make rear-%%{version}-clean.tar.gz"
+# while in the tarball's directory:
+Source4: Makefile
 
 ######################
 # upstream backports #
@@ -241,7 +246,9 @@ install -m 0644 %{SOURCE3} %{buildroot}%{_docdir}/%{name}/
 #-- FILES ---------------------------------------------------------------------#
 %files
 %license COPYING
-%doc MAINTAINERS README.adoc doc/*.txt doc/user-guide/*.html
+%doc MAINTAINERS README.adoc doc/user-guide/*.html
+# the only upstream *.txt file has an unacceptable license (CC-BY-ND-3.0)
+#%%doc doc/*.txt
 %dir %{_sysconfdir}/rear/
 %config(noreplace) %{_sysconfdir}/rear/local.conf
 %{_sysconfdir}/rear/os.conf