root@darkstar:~# slackpkg search libreoffice-7.0.3-x86_64-2alien

Looking for libreoffice-7\.0\.3-x86_64-2alien in package list. Please wait... DONE

The list below shows all packages with name matching "libreoffice-7\.0\.3-x86_64-2alien".

[ Status           ] [ Repository               ] [ Package                                  ]
  uninstalled              alienbob                     libreoffice-7.0.3-x86_64-2alien           

You can search specific files using "slackpkg file-search file".

root@darkstar:~# slackpkg install libreoffice-7.0.3-x86_64-2alien

Looking for libreoffice-7.0.3-x86_64-2alien in package list. Please wait... DONE

No packages match the pattern for install. Try:

        /usr/sbin/slackpkg reinstall|upgrade

# Configuration for slackpkg+. See /usr/doc/slackpkg+-*/README for more details
# Please read manpage: "man slackpkgplus.conf" and documentation /usr/doc/slackpkg+-*/README

# Enable (on) / Disable (off) slackpkg+
SLACKPKGPLUS=on

# set to '0' to never show the download progress bar
# set to '1' to show the bar only in download packages (default)
# set to '2' to always show the download bar
# set to '3' for a debug mode
VERBOSE=1

# By default slackpkg+ deny to install 32bit packages.
#
# Set this flag to 'on' allow slackpkg+ to install 32bit packages on a 64bit slackware 
# installation (possibly unsafe). Please, do not install both 32 and 64bit of the same 
# package to avoid problems, and NEVER upgrade existant 64bit packages with relative 32bit package.
# Do not forget to install the multilibs.
ALLOW32BIT=off

# Enable (1) / Disable (0) the official slackpkg blacklist. May be useful to temporarily skip
# the slackware blacklist. You can also override it from command line:
# 'USEBL=0 slackpkg upgrade-all'
USEBL=1

# Add custom option to 'wget'.
# You can solve the repository indisponibility issue by set a timeout here
WGETOPTS="--timeout=20 --tries=2"

# If you want replace wget with another downloader search DOWNLOADCMD in documentation
# at /usr/doc/slackpkg+-*/README
#DOWNLOADCMD="wget -O"

# Defines if the changelog of any 3rd party repository must be searched in parent URL when not found in base URL.
# Can be set to "on" or "off" (default)
SEARCH_CLOG_INPARENT=on

# Use the cache for metadata files (CHECKSUMS.md5,...). Enable it (on) to speedup the slackpkg update
# process by downloading just new files (see README). Disabled by default (off)
CACHEUPDATE=off

# You can download-only by setting DOWNLOADONLY to 'on'. You may (you should) also use it in commandline
# for example: "DOWNLOADONLY=on slackpkg upgrade-all". Useful for large upgrades.
#DOWNLOADONLY=off

# Enable (on) / Disable (off) notification events (see notifymsg.conf)
#ENABLENOTIFY=off

# Enable (on) / Disable (off) the greylist feature. See /etc/slackpkg/greylist
GREYLIST=on

# Defines if commands 'search' and 'file-search' are case-sensitive (on) or not (off). Default to "on"
SENSITIVE_SEARCH=on

# Defines if command 'file-search' does search Wole Word (on) of accept partial words (off). Note that
# you may obtains many many results searching a short partial word
WW_FILE_SEARCH=on

# Select the show order in dialogbox. Available "package" "repository" "tag" "path" "arch"
SHOWORDER=package

# Allow to show more details of the package in slackpkg info <package>. Accept "none", "basic", "filelist"
DETAILED_INFO=none

# Enable (on) / Disable (off) a Strict GPG Check. A repository should contains packages signed
# with the only original GPG-KEY. In some custom repository may be wanted to mix heterogeneous
# packages; to use that repository set Strict GPG Check to off. P.S: a repository can
# contain just ONE gpg-key; you may manually import the other.
STRICTGPG=on

# If two or more repositories contains some same packages, you can specify
# from which repository you prefer to search it.
# The syntax is "<repository_name>:<package_name>"
# Accepts regular expressions. To give priority to an entire repository use "<repository_name>"

# Examples:
#PKGS_PRIORITY=( restricted:vlc )
# OR
#PKGS_PRIORITY=( myrepo )
# 
# if you have two reporitories to give priority you must set both in the same line
#PKGS_PRIORITY=( myrepo restricted:vlc )
#
# if you want to install 'ktown' repository you must set it here
#PKGS_PRIORITY=( ktown )
# and DO NOT MISS to read special instruction on /usr/doc/slackpkg+-*/repositories.txt
#
# If you want a multilib system, uncomment the multilib repository and set:
#PKGS_PRIORITY=( multilib )
#
# (Use /usr/doc/slackpkg+-*/setupmultilib.sh to setup a multilib configuration)
#
# For both multilib and ktown set
PKGS_PRIORITY=( alienbob multilib slackpkgplus slackonly )

# Otherwise you can try to upgrade a package from a repository that contains a package with the
# same tag of the already installed package. Tipically that means to upgrade a package from the
# same author of the already installed package.
# Note that this method may not works properly where two repositories contains a package with the
# same tag.
# Set TAG_PRIORITY to 'on' to enable this function
TAG_PRIORITY=off

# List repositories you want to use (defined below)
# remember to launch 'slackpkg update' if you modify that row.
#REPOPLUS=( slackpkgplus restricted alienbob slacky )
REPOPLUS=( alienbob multilib slackpkgplus slackonly )



MIRRORPLUS['alienbob']=http://bear.alienbase.nl/mirrors/people/alien/sbrepos/current/x86_64/
MIRRORPLUS['slackonly']=http://packages.slackonly.com/pub/packages/current-x86_64/
MIRRORPLUS['multilib']=http://bear.alienbase.nl/mirrors/people/alien/multilib/current/

root@darkstar:~# slackpkg install libreoffice

slackpkg reinstall libreoffice-7.0.3-x86_64-2alien