diff --git a/libraries/tox-extension-messages/README b/libraries/tox-extension-messages/README
new file mode 100644
index 0000000000..d9b34a94c5
--- /dev/null
+++ b/libraries/tox-extension-messages/README
@@ -0,0 +1,3 @@
+Tox Extension Messages
+
+This is part of ToxExt, an extension library for tox.
diff --git a/libraries/tox-extension-messages/slack-desc b/libraries/tox-extension-messages/slack-desc
new file mode 100644
index 0000000000..4d92b32a1f
--- /dev/null
+++ b/libraries/tox-extension-messages/slack-desc
@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+                      |-----handy-ruler------------------------------------------------------|
+tox-extension-messages: tox-extension-messages (extension library for tox)
+tox-extension-messages:
+tox-extension-messages: This is part of ToxExt, an extension library for tox.
+tox-extension-messages:
+tox-extension-messages: Homepage: https://github.com/toxext/tox_extension_messages
+tox-extension-messages:
+tox-extension-messages:
+tox-extension-messages:
+tox-extension-messages:
+tox-extension-messages:
+tox-extension-messages:
diff --git a/libraries/tox-extension-messages/tox-extension-messages.SlackBuild b/libraries/tox-extension-messages/tox-extension-messages.SlackBuild
new file mode 100644
index 0000000000..0f438f303a
--- /dev/null
+++ b/libraries/tox-extension-messages/tox-extension-messages.SlackBuild
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+# Slackware build script for tox-extension-messages
+
+# Copyright 2021 Dr. Martin Rogge
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PRGNAM=tox-extension-messages
+VERSION=${VERSION:-0.0.2}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i486" ]; then
+  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
+mv ${PRGNAM//-/_}-$VERSION $PRGNAM-$VERSION
+cd $PRGNAM-$VERSION
+
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+cmake . \
+  -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
+  -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS -Wno-error" \
+  -DCMAKE_INSTALL_PREFIX=/usr
+make
+make install DESTDIR=$PKG
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a LICENSE $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
diff --git a/libraries/tox-extension-messages/tox-extension-messages.info b/libraries/tox-extension-messages/tox-extension-messages.info
new file mode 100644
index 0000000000..125373020f
--- /dev/null
+++ b/libraries/tox-extension-messages/tox-extension-messages.info
@@ -0,0 +1,10 @@
+PRGNAM="tox-extension-messages"
+VERSION="0.0.2"
+HOMEPAGE="https://github.com/toxext/tox_extension_messages"
+DOWNLOAD="https://github.com/toxext/tox_extension_messages/archive/refs/tags/v0.0.2.tar.gz"
+MD5SUM="fcf8e98df80cbfc64c8d1de6740c247c"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="toxext"
+MAINTAINER="Martin Rogge"
+EMAIL="martin_rogge@users.sourceforge.net"