diff --git a/libraries/cppo/README b/libraries/cppo/README
deleted file mode 100644
index b8f9d84c8c..0000000000
--- a/libraries/cppo/README
+++ /dev/null
@@ -1,2 +0,0 @@
-Cppo is an equivalent of the C preprocessor for OCaml programs.
-It allows the definition of simple macros and file.
diff --git a/libraries/cppo/cppo.SlackBuild b/libraries/cppo/cppo.SlackBuild
deleted file mode 100644
index d2f29bacec..0000000000
--- a/libraries/cppo/cppo.SlackBuild
+++ /dev/null
@@ -1,97 +0,0 @@
-#!/bin/bash
-
-# Slackware build script for cppo
-
-# Copyright 2019 Matteo Bernardini <ponce@slackbuilds.org>, Pisa, Italy
-# 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.
-
-cd $(dirname $0) ; CWD=$(pwd)
-
-PRGNAM=cppo
-VERSION=${VERSION:-1.6.6}
-BUILD=${BUILD:-1}
-TAG=${TAG:-_SBo}
-PKGTYPE=${PKGTYPE:-tgz}
-
-if [ -z "$ARCH" ]; then
-  case "$( uname -m )" in
-    i?86) ARCH=i586 ;;
-    arm*) ARCH=arm ;;
-       *) ARCH=$( uname -m ) ;;
-  esac
-fi
-
-# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
-# the name of the created package would be, and then exit. This information
-# could be useful to other scripts.
-if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
-  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
-  exit 0
-fi
-
-TMP=${TMP:-/tmp/SBo}
-PKG=$TMP/package-$PRGNAM
-OUTPUT=${OUTPUT:-/tmp}
-
-if [ "$ARCH" = "i586" ]; then
-  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
-  LIBDIRSUFFIX=""
-elif [ "$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.?z*
-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 {} \;
-
-dune build
-dune 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
-
-rm -fR $PKG/usr/doc
-mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
-cp -a Changes *.md $PKG/usr/doc/$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
diff --git a/libraries/cppo/cppo.info b/libraries/cppo/cppo.info
deleted file mode 100644
index 1ca6d5a170..0000000000
--- a/libraries/cppo/cppo.info
+++ /dev/null
@@ -1,10 +0,0 @@
-PRGNAM="cppo"
-VERSION="1.6.6"
-HOMEPAGE="https://github.com/ocaml-community/cppo/"
-DOWNLOAD="https://github.com/ocaml-community/cppo/archive/v1.6.6/cppo-1.6.6.tar.gz"
-MD5SUM="2258f90f3b7f0190bda76b710df0af56"
-DOWNLOAD_x86_64=""
-MD5SUM_x86_64=""
-REQUIRES="dune ocamlbuild"
-MAINTAINER="Matteo Bernardini"
-EMAIL="ponce@slackbuilds.org"
diff --git a/libraries/cppo/slack-desc b/libraries/cppo/slack-desc
deleted file mode 100644
index bc43af6c08..0000000000
--- a/libraries/cppo/slack-desc
+++ /dev/null
@@ -1,19 +0,0 @@
-# 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------------------------------------------------------|
-cppo: cppo (C-style preprocessor for OCaml)
-cppo:
-cppo: Cppo is an equivalent of the C preprocessor for OCaml programs.
-cppo: It allows the definition of simple macros and file.
-cppo:
-cppo: homepage: https://github.com/ocaml-community/cppo
-cppo:
-cppo:
-cppo:
-cppo:
-cppo: