diff --git a/jitterentropy.changes b/jitterentropy.changes
index c0866ee..bb8adcf 100644
--- a/jitterentropy.changes
+++ b/jitterentropy.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Sep 28 20:19:44 UTC 2021 - Jan Engelhardt <jengelh@inai.de>
+
+- Trim conjecture from descriptions.
+
 -------------------------------------------------------------------
 Tue Sep 21 12:25:00 UTC 2021 - Marcus Meissner <meissner@suse.com>
 
diff --git a/jitterentropy.spec b/jitterentropy.spec
index 8183ce8..fdfa4dc 100644
--- a/jitterentropy.spec
+++ b/jitterentropy.spec
@@ -1,7 +1,7 @@
 #
-# spec file for package hello
+# spec file for package jitterentropy
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2021 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -18,78 +18,63 @@
 
 Name:           jitterentropy
 Summary:        A userspace library for jitter entropy generation
-License:        GPL-2.0-or-later OR BSD-3-Clause
+License:        BSD-3-Clause OR GPL-2.0-or-later
 Group:          Development/Tools/Other
 Version:        3.3.0
 Release:        0
-Url:            https://github.com/smuellerDD/jitterentropy-library
+URL:            https://github.com/smuellerDD/jitterentropy-library
 Source0:        https://github.com/smuellerDD/jitterentropy-library/archive/refs/tags/v%{version}.tar.gz
-Source1:	baselibs.conf
+Source1:        baselibs.conf
 
 %description
 The Jitter RNG provides a noise source using the CPU execution
-timing jitter. It does not depend on any system resource other than
-a high-resolution time stamp. It is a small-scale, yet fast entropy
-source that is viable in almost all environments and on a lot of CPU
-architectures.
+timing jitter. It depends on a high-resolution time stamp.
 
-The implementation of the Jitter RNG is independent of any operating
-system. As such, it could even run on baremetal without any operating
-system.
-
-The design of the RNG is given in the documentation found in at
+The design of this RNG is given in the documentation found at
 http://www.chronox.de/jent.html . This documentation also covers the full
 assessment of the SP800-90B compliance as well as all required test code.
 
 %package -n libjitterentropy3
-Summary:	Jitter entropy generator shared library
-Group:          Development/Tools/Other
+Summary:        Jitter entropy generator shared library
+Group:          System/Libraries
 
 %description -n libjitterentropy3
 The Jitter RNG provides a noise source using the CPU execution
-timing jitter. It does not depend on any system resource other than
-a high-resolution time stamp. It is a small-scale, yet fast entropy
-source that is viable in almost all environments and on a lot of CPU
-architectures.
+timing jitter. It depends on a high-resolution time stamp.
 
 This package contains the shared library.
 
 %package devel
-Summary:	Jitter entropy generator development header and library
+Summary:        Jitter entropy generator development header and library
 Group:          Development/Tools/Other
-Requires: 	libjitterentropy3 = %{version}
+Requires:       libjitterentropy3 = %{version}
 
 %description devel
 The Jitter RNG provides a noise source using the CPU execution
-timing jitter. It does not depend on any system resource other than
-a high-resolution time stamp. It is a small-scale, yet fast entropy
-source that is viable in almost all environments and on a lot of CPU
-architectures.
+timing jitter. It depends on a high-resolution time stamp.
 
 This package contains the development header and library.
 
 %prep
-%setup -q -n jitterentropy-library-%version
+%autosetup -n jitterentropy-library-%version
 
 %build
-make PREFIX=/usr LIBDIR=%_lib
+%make_build PREFIX="%_prefix" LIBDIR="%_lib"
 
 %install
-%make_install PREFIX=/usr LIBDIR=%_lib
+%make_install PREFIX="%_prefix" LIBDIR="%_lib"
 
 %post -n libjitterentropy3 -p /sbin/ldconfig
 %postun -n libjitterentropy3 -p /sbin/ldconfig
 
 %files devel
-%defattr(-, root, root)
 %license LICENSE.gplv2 LICENSE LICENSE.bsd
-/usr/include/jitterentropy-base-user.h
-/usr/include/jitterentropy.h
+%_includedir/jitterentropy-base-user.h
+%_includedir/jitterentropy.h
 %_libdir/libjitterentropy.so
 %_mandir/man3/jitterentropy.3*
 
 %files -n libjitterentropy3
-%defattr(-, root, root)
 %license LICENSE.gplv2 LICENSE LICENSE.bsd
 %_libdir/libjitterentropy.so.3
 %_libdir/libjitterentropy.so.3.3.0