diff --git a/haskell/haskell-indexed-traversable/README b/haskell/haskell-indexed-traversable/README
new file mode 100644
index 0000000000..96c2f48a17
--- /dev/null
+++ b/haskell/haskell-indexed-traversable/README
@@ -0,0 +1,4 @@
+FunctorWithIndex, FoldableWithIndex, TraversableWithIndex
+
+After uninstalling, run this command to unregister the package from
+the ghc package database:   ghc-pkg recache
diff --git a/haskell/haskell-indexed-traversable/doinst.sh b/haskell/haskell-indexed-traversable/doinst.sh
new file mode 100644
index 0000000000..3268c238bf
--- /dev/null
+++ b/haskell/haskell-indexed-traversable/doinst.sh
@@ -0,0 +1 @@
+chroot . /usr/bin/ghc-pkg recache
diff --git a/haskell/haskell-indexed-traversable/haskell-indexed-traversable.SlackBuild b/haskell/haskell-indexed-traversable/haskell-indexed-traversable.SlackBuild
new file mode 100644
index 0000000000..b505926d03
--- /dev/null
+++ b/haskell/haskell-indexed-traversable/haskell-indexed-traversable.SlackBuild
@@ -0,0 +1,128 @@
+#!/bin/bash
+
+# Slackware build script for haskell-indexed-traversable
+
+# Copyright 2021 Andrew Clemons, Wellington New Zealand
+# 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=haskell-indexed-traversable
+VERSION=${VERSION:-0.1.2}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+PKGTYPE=${PKGTYPE:-tgz}
+
+SRCNAM="$( echo $PRGNAM | cut -d- -f2- )"
+
+GHC_VERSION=$(ghc --numeric-version)
+
+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 $SRCNAM-$VERSION
+tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
+cd $SRCNAM-$VERSION
+cat << EOF > Setup.hs
+module Main (main) where
+
+import Distribution.Simple
+
+main :: IO ()
+main = defaultMain
+EOF
+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 {} \;
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+runghc Setup configure \
+  --prefix=/usr \
+  --libdir=/usr/lib${LIBDIRSUFFIX} \
+  --libsubdir=ghc-${GHC_VERSION}/$SRCNAM-$VERSION \
+  --enable-shared \
+  --enable-library-profiling \
+  --docdir=/usr/doc/$PRGNAM-$VERSION
+
+runghc Setup build
+runghc Setup haddock
+runghc Setup copy --destdir=$PKG
+runghc Setup register --gen-pkg-config
+
+PKGCONFD=/usr/lib${LIBDIRSUFFIX}/ghc-${GHC_VERSION}/package.conf.d
+PKGID=$( grep -E "^id: " $SRCNAM-$VERSION.conf | sed "s/[[:space:]][[:space:]]*/ /" | cut -d" " -f2 )
+mkdir -p $PKG/$PKGCONFD
+mv $SRCNAM-$VERSION.conf $PKG/$PKGCONFD/$PKGID.conf
+
+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 \
+  Changelog.md 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
+cat $CWD/doinst.sh > $PKG/install/doinst.sh
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE
diff --git a/haskell/haskell-indexed-traversable/haskell-indexed-traversable.info b/haskell/haskell-indexed-traversable/haskell-indexed-traversable.info
new file mode 100644
index 0000000000..98445e95f4
--- /dev/null
+++ b/haskell/haskell-indexed-traversable/haskell-indexed-traversable.info
@@ -0,0 +1,10 @@
+PRGNAM="haskell-indexed-traversable"
+VERSION="0.1.2"
+HOMEPAGE="https://hackage.haskell.org/package/indexed-traversable"
+DOWNLOAD="https://hackage.haskell.org/package/indexed-traversable-0.1.2/indexed-traversable-0.1.2.tar.gz"
+MD5SUM="4213af572c592a9a21e73bf3d376c362"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="haskell-void haskell-generic-deriving"
+MAINTAINER="Andrew Clemons"
+EMAIL="andrew.clemons@gmail.com"
diff --git a/haskell/haskell-indexed-traversable/slack-desc b/haskell/haskell-indexed-traversable/slack-desc
new file mode 100644
index 0000000000..e19b4132f1
--- /dev/null
+++ b/haskell/haskell-indexed-traversable/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------------------------------------------------------|
+haskell-indexed-traversable: haskell-indexed-traversable (traversables with index)
+haskell-indexed-traversable:
+haskell-indexed-traversable: This package provides three useful generalizations: FunctorWithIndex,
+haskell-indexed-traversable: FoldableWithIndex, TraversableWithIndex
+haskell-indexed-traversable:
+haskell-indexed-traversable:
+haskell-indexed-traversable: https://hackage.haskell.org/package/indexed-traversable
+haskell-indexed-traversable:
+haskell-indexed-traversable:
+haskell-indexed-traversable:
+haskell-indexed-traversable: