diff --git a/INSTALL b/INSTALL
index ad548dc..fbf3bb3 100755
--- a/INSTALL
+++ b/INSTALL
@@ -1,30 +1,29 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Script to install required external packages
 
-# Get the OS
-OS=$(uname -s)
-
 # Set location of WFM
-WFM_DIR=$(pwd)
-
-# Set location where tarfiles for packages are kept
-TAR_DIR=${WFM_DIR}/tarfiles
+WFM_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 
-# Set location where packages are built
-BUILD_DIR=${WFM_DIR}/build
-
-# Set the location where libraries are installed
-LIB_DIR=${WFM_DIR}/lib
+# Set the location where gem dependencies are installed
+GEM_DIR=${WFM_DIR}/gems
 
 # Process arguments
 for arg in $@; do
   case $arg in
     --with-ruby=*) RUBY=$(echo $arg | cut -f 2 -d "=")/bin/ruby;;
+    --with-xml2-dir=*) xml2dir=$(echo $arg | cut -f 2 -d "=");;
+    --with-xml2-include=*) xml2include=$(echo $arg | cut -f 2 -d "=");;
+    --with-xml2-config=*) xml2config=$(echo $arg | cut -f 2 -d "=");;
+    --with-xml2-lib=*) xml2lib=$(echo $arg | cut -f 2 -d "=");;
     -h|--help) echo
                echo "Run this script to install the Workflow Manager"
                echo
-               echo "INSTALL [--with-ruby=/path/to/ruby]"
+               echo 'INSTALL [--with-ruby=/path/to/ruby]'
+               echo '[--with-xml2-dir=/path/to/${xml2-dir}]'
+               echo '[--with-xml2-include=/path/to/${xml2-dir}/include]'
+               echo '[--with-xml2-config=/path/to/xml2-config]'
+               echo '[--with-xml2-lib=/path/to/${xml2-dir}/lib]'
                echo
                exit;;
     *)
@@ -48,13 +47,34 @@ else
   exit 1
 fi
 
+GEM_ARGS=""
+# Check whether libxml2 headers, libs, and xml2-config are defined
+# xml2dir
+if [[  -n "$xml2dir" &&  -d "$xml2dir" ]]; then
+    GEM_ARGS+=" --with-xml2-dir="$xml2dir
+    [[ -z "${xml2include+x}" || ! -d "${xml2include}" ]] && xml2include=${xml2dir}/include
+    [[ -z "${xml2lib+x}" || ! -d "${xml2lib}" ]] && xml2lib=${xml2dir}/lib
+    [[ -z "${xml2config+x}" || ! -d "${xml2config}" ]] && xml2config=${xml2dir}/bin/xml2-config
+fi
+# Add configuration options if they are set:
+if [[ -n "${xml2include}" && -d "${xml2include}" ]]; then 
+   GEM_ARGS+=" --with-xml2-include="$xml2include
+fi
+
+if [[ -n "${xml2lib}" && -d "${xml2lib}" ]]; then 
+   GEM_ARGS+=" --with-xml2-lib="$xml2lib
+fi
+
+if [[ -n "${xml2config}" && -f "${xml2config}" ]]; then 
+   GEM_ARGS+=" --with-xml2-config="$xml2config
+fi
 # Abort if any command returns an error
 set -e
 
-# Make sure ruby is at least 2.4.0 or higher
-good_ruby=$($RUBY -e "puts RUBY_VERSION >= '2.4.0'")
+# Make sure ruby is at least 3.0.0 or higher
+good_ruby=$($RUBY -e "puts RUBY_VERSION >= '3.0.0'")
 if [ "$good_ruby" = "false" ]; then
-  echo "Ruby 2.4.0 or higher is required"
+  echo "Ruby 3.0.0 or higher is required"
   exit 1
 fi
 
@@ -67,147 +87,16 @@ for file in $(ls sbin | grep -v '\.sh'); do
   fi
 
   # Replace first line with correct shebang
-  sed "1s:.*:#!${RUBY}:" sbin/$file > sbin/$file.new
-  mv sbin/$file.new sbin/$file
-
-  # Add path to libxml2 for AIX
-  if [ "$OS" = "AIX" ]; then
-    sed "2s%.*%ENV['LIBPATH']=\"${LIB_DIR}/libxml2/lib:#{ENV['LIBPATH']}\"%" sbin/$file > sbin/$file.new
-    mv sbin/$file.new sbin/$file
-  fi
-
-  # Make sure the new file is executable
-  chmod ugo+x sbin/$file
+  sed "1s:.*:#!${RUBY}:" -i sbin/$file
 
 done
 
-# Package versions
-LIBXML2_VERSION="2.12.6"
-LIBXML_RUBY_VERSION="5.0.3"
-SYSTEMTIMER_VERSION="1.2.3"
-SQLITE3_VERSION="autoconf-3450300"
-SQLITE3_RUBY_VERSION="1.7.3"
-OPEN4_VERSION="1.3.4"
-RUBYSL_DATE_VERSION="2.0.9"
-RUBYSL_PARSEDATE_VERSION="1.0.1"
-THREAD_VERSION="0.2.2"
-
-# Set AIX_CFLAGS and AIX_LDFLAGS
-if [ "$OS" = "AIX" ]; then
-  AIX_CFLAGS="-maix64 -g0"
-  AIX_LDFLAGS="-maix64 -g0"
-else
-  AIX_CFLAGS=""
-  AIX_LDFLAGS=""
-fi
-
-# Create the build directory
-mkdir -p ${BUILD_DIR}
-
-# Install rubysl-date
-echo "==========================================="
-echo "= INSTALLING rubysl-date"
-echo "==========================================="
-cd ${LIB_DIR}
-gunzip -c ${TAR_DIR}/rubysl-date-${RUBYSL_DATE_VERSION}.tar.gz | tar -xvf -
-rm -rf rubysl-date
-mv rubysl-date-${RUBYSL_DATE_VERSION} rubysl-date
-
-# Install rubysl-parsedate
-echo "==========================================="
-echo "= INSTALLING rubysl-parsedate"
-echo "==========================================="
-cd ${LIB_DIR}
-gunzip -c ${TAR_DIR}/rubysl-parsedate-${RUBYSL_PARSEDATE_VERSION}.tar.gz | tar -xvf -
-rm -rf rubysl-parsedate
-mv rubysl-parsedate-${RUBYSL_PARSEDATE_VERSION} rubysl-parsedate
-
-# Install Open4
-echo "==========================================="
-echo "= INSTALLING Open4"
-echo "==========================================="
-cd ${LIB_DIR}
-gunzip -c ${TAR_DIR}/open4-${OPEN4_VERSION}.tar.gz | tar -xvf -
-rm -rf open4
-mv open4-${OPEN4_VERSION} open4
-
-# Install libxml2
-echo "==========================================="
-echo "= INSTALLING libxml2                      ="
-echo "==========================================="
-cd ${BUILD_DIR}
-unxz -c ${TAR_DIR}/libxml2-${LIBXML2_VERSION}.tar.xz | tar -xvf -
-cd libxml2-${LIBXML2_VERSION}
-if [ "$LIBXML2_VERSION" = "2.9.0" ]; then    # version 2.9.0 requires must be patched
-  echo "==========================================="
-  echo "= PATCHING libxml2                        ="
-  echo "==========================================="
-  patch -p1 -i ${TAR_DIR}/libxml2-2.9.0.patch
-fi
-export OBJECT_MODE=64
-./configure --prefix=${LIB_DIR}/libxml2 CFLAGS="$AIX_CFLAGS" LDFLAGS="$AIX_LDFLAGS" --without-python
-make clean
-make
-rm -rf ${LIB_DIR}/libxml2
-make install
-
-# Install libxml-ruby
-echo "==========================================="
-echo "= INSTALLING libxml-ruby                  ="
-echo "==========================================="
-libxml2_opts="--with-xml2-lib=${LIB_DIR}/libxml2/lib --with-xml2-include=${LIB_DIR}/libxml2/include/libxml2"
-cd ${BUILD_DIR}
-gunzip -c ${TAR_DIR}/libxml-ruby-${LIBXML_RUBY_VERSION}.tar.gz | tar -xvf -
-cd libxml-ruby-${LIBXML_RUBY_VERSION}/ext/libxml
-echo ${RUBY} extconf.rb $libxml2_opts
-${RUBY} extconf.rb $libxml2_opts
-if [ "$OS" = "AIX" ]; then
-  :
-else
-  sed -i "/^ldflags/ s:$: -Wl,-rpath,${LIB_DIR}/libxml2/lib:" Makefile
-fi
-make clean
-make
-rm -rf ${LIB_DIR}/libxml-ruby
-mkdir ${LIB_DIR}/libxml-ruby
-cp -r ${BUILD_DIR}/libxml-ruby-${LIBXML_RUBY_VERSION}/lib/* ${LIB_DIR}/libxml-ruby
-cp libxml_ruby.so ${LIB_DIR}/libxml-ruby
-
-# Install sqlite3
-echo "==========================================="
-echo "= INSTALLING sqlite3                      ="
-echo "==========================================="
-cd ${BUILD_DIR}
-unxz -c ${TAR_DIR}/sqlite-${SQLITE3_VERSION}.tar.xz | tar -xvf -
-cd sqlite-${SQLITE3_VERSION}
-./configure --prefix=${LIB_DIR}/sqlite3 CFLAGS="-Os -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_THREADSAFE=1 $AIX_CFLAGS $AIX_CFLAGS" LD_FLAGS="$AIX_LDFLAGS"
-make clean
-make
-rm -rf ${LIB_DIR}/sqlite3
-make install
-
-# Install sqlite3-ruby
-echo "==========================================="
-echo "= INSTALLING sqlite3-ruby                 ="
-echo "==========================================="
-cd ${BUILD_DIR}
-gunzip -c ${TAR_DIR}/sqlite3-ruby-${SQLITE3_RUBY_VERSION}.tar.gz | tar -xvf -
-cd sqlite3-ruby-${SQLITE3_RUBY_VERSION}/ext/sqlite3
-export LD_RUN_PATH=${LIB_DIR}/sqlite3/lib
-${RUBY} extconf.rb -- --with-sqlite3-include=${LIB_DIR}/sqlite3/include --with-sqlite3-lib=${LIB_DIR}/sqlite3/lib --enable-system-libraries
-make clean
-make
-rm -rf ${LIB_DIR}/sqlite3-ruby
-mkdir ${LIB_DIR}/sqlite3-ruby
-cp -r ${BUILD_DIR}/sqlite3-ruby-${SQLITE3_RUBY_VERSION}/lib/* ${LIB_DIR}/sqlite3-ruby
-cp sqlite3_native.so ${LIB_DIR}/sqlite3-ruby/sqlite3
-unset LDFLAGS
-
-# Insteall thread
-echo "==========================================="
-echo "= INSTALLING Thread"
-echo "==========================================="
-cd ${LIB_DIR}
-gunzip -c ${TAR_DIR}/thread-${THREAD_VERSION}.tar.gz | tar -xvf -
-rm -rf thread
-mv thread-${THREAD_VERSION} thread
+# Install gem dependencies into local gem repository
+gem install -i ${GEM_DIR} --no-user-install --no-document \
+    open4:1.3.4 \
+    rubysl-date:1.0.1 \
+    rubysl-parsedate:1.0.1 \
+    sqlite3:1.7.3 \
+    thread:0.2.2 \
+    libxml-ruby:5.0.3 \
+    -- $GEM_ARGS
diff --git a/lib/workflowmgr/workflowdoc.rb b/lib/workflowmgr/workflowdoc.rb
index f865909..e0df337 100644
--- a/lib/workflowmgr/workflowdoc.rb
+++ b/lib/workflowmgr/workflowdoc.rb
@@ -14,7 +14,7 @@ class WorkflowXMLDoc
 
     require 'time'
 
-    require 'libxml-ruby/libxml'
+    require 'libxml'
     require 'workflowmgr/utilities'
     require 'workflowmgr/cycledef'
     require 'workflowmgr/workflowlog'
diff --git a/lib/workflowmgr/workflowio.rb b/lib/workflowmgr/workflowio.rb
index 5aa28eb..b6a0150 100644
--- a/lib/workflowmgr/workflowio.rb
+++ b/lib/workflowmgr/workflowio.rb
@@ -13,7 +13,7 @@ module WorkflowMgr
   class WorkflowIO
 
     require 'fileutils'
-    require 'libxml-ruby/libxml'
+    require 'libxml'
 
 
     ##########################################
diff --git a/sbin/rocotoboot.rb b/sbin/rocotoboot.rb
index 3cb2927..e5edf98 100755
--- a/sbin/rocotoboot.rb
+++ b/sbin/rocotoboot.rb
@@ -3,15 +3,12 @@
 # Get the base directory of the WFM installation
 __WFMDIR__=File.expand_path("../../",__FILE__)
 
-# Add include paths for WFM and libxml-ruby libraries
+# Add include paths for WFM and gem dependencies
 $:.unshift("#{__WFMDIR__}/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-date/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-parsedate/lib")
-$:.unshift("#{__WFMDIR__}/lib/libxml-ruby")
-$:.unshift("#{__WFMDIR__}/lib/sqlite3-ruby")
-$:.unshift("#{__WFMDIR__}/lib/SystemTimer")
-$:.unshift("#{__WFMDIR__}/lib/open4/lib")
-$:.unshift("#{__WFMDIR__}/lib/thread/lib")
+Dir["#{__WFMDIR__}/gems/gems/*"].each do |gemdir|
+  next if gemdir == "." or gemdir == ".."
+  $:.unshift("#{gemdir}/lib")
+end
 
 # Load workflow status library
 require 'workflowmgr/workflowengine'
diff --git a/sbin/rocotocheck.rb b/sbin/rocotocheck.rb
index 9840c5a..98d6f2e 100755
--- a/sbin/rocotocheck.rb
+++ b/sbin/rocotocheck.rb
@@ -3,15 +3,12 @@
 # Get the base directory of the WFM installation
 __WFMDIR__=File.expand_path("../../",__FILE__)
 
-# Add include paths for WFM and libxml-ruby libraries
+# Add include paths for WFM and gem dependencies
 $:.unshift("#{__WFMDIR__}/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-date/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-parsedate/lib")
-$:.unshift("#{__WFMDIR__}/lib/libxml-ruby")
-$:.unshift("#{__WFMDIR__}/lib/sqlite3-ruby")
-$:.unshift("#{__WFMDIR__}/lib/SystemTimer")
-$:.unshift("#{__WFMDIR__}/lib/open4/lib")
-$:.unshift("#{__WFMDIR__}/lib/thread/lib")
+Dir["#{__WFMDIR__}/gems/gems/*"].each do |gemdir|
+  next if gemdir == "." or gemdir == ".."
+  $:.unshift("#{gemdir}/lib")
+end
 
 # Load workflow status library
 require 'wfmstat/statusengine'
diff --git a/sbin/rocotocomplete.rb b/sbin/rocotocomplete.rb
index 92b6154..b58e6f5 100755
--- a/sbin/rocotocomplete.rb
+++ b/sbin/rocotocomplete.rb
@@ -3,15 +3,12 @@
 # Get the base directory of the WFM installation
 __WFMDIR__=File.expand_path("../../",__FILE__)
 
-# Add include paths for WFM and libxml-ruby libraries
+# Add include paths for WFM and gem dependencies
 $:.unshift("#{__WFMDIR__}/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-date/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-parsedate/lib")
-$:.unshift("#{__WFMDIR__}/lib/libxml-ruby")
-$:.unshift("#{__WFMDIR__}/lib/sqlite3-ruby")
-$:.unshift("#{__WFMDIR__}/lib/SystemTimer")
-$:.unshift("#{__WFMDIR__}/lib/open4/lib")
-$:.unshift("#{__WFMDIR__}/lib/thread/lib")
+Dir["#{__WFMDIR__}/gems/gems/*"].each do |gemdir|
+  next if gemdir == "." or gemdir == ".."
+  $:.unshift("#{gemdir}/lib")
+end
 
 # Load workflow status library
 require 'workflowmgr/workflowengine'
diff --git a/sbin/rocotorewind.rb b/sbin/rocotorewind.rb
index 4808efe..a6d3ede 100755
--- a/sbin/rocotorewind.rb
+++ b/sbin/rocotorewind.rb
@@ -3,15 +3,12 @@
 # Get the base directory of the WFM installation
 __WFMDIR__=File.expand_path("../../",__FILE__)
 
-# Add include paths for WFM and libxml-ruby libraries
+# Add include paths for WFM and gem dependencies
 $:.unshift("#{__WFMDIR__}/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-date/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-parsedate/lib")
-$:.unshift("#{__WFMDIR__}/lib/libxml-ruby")
-$:.unshift("#{__WFMDIR__}/lib/sqlite3-ruby")
-$:.unshift("#{__WFMDIR__}/lib/SystemTimer")
-$:.unshift("#{__WFMDIR__}/lib/open4/lib")
-$:.unshift("#{__WFMDIR__}/lib/thread/lib")
+Dir["#{__WFMDIR__}/gems/gems/*"].each do |gemdir|
+  next if gemdir == "." or gemdir == ".."
+  $:.unshift("#{gemdir}/lib")
+end
 
 # Load workflow engine library
 require 'workflowmgr/workflowengine'
diff --git a/sbin/rocotorun.rb b/sbin/rocotorun.rb
index 2e3034c..e7ca165 100755
--- a/sbin/rocotorun.rb
+++ b/sbin/rocotorun.rb
@@ -3,15 +3,12 @@
 # Get the base directory of the WFM installation
 __WFMDIR__=File.expand_path("../../",__FILE__)
 
-# Add include paths for WFM and libxml-ruby libraries
+# Add include paths for WFM and gem dependencies
 $:.unshift("#{__WFMDIR__}/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-date/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-parsedate/lib")
-$:.unshift("#{__WFMDIR__}/lib/libxml-ruby")
-$:.unshift("#{__WFMDIR__}/lib/sqlite3-ruby")
-$:.unshift("#{__WFMDIR__}/lib/SystemTimer")
-$:.unshift("#{__WFMDIR__}/lib/open4/lib")
-$:.unshift("#{__WFMDIR__}/lib/thread/lib")
+Dir["#{__WFMDIR__}/gems/gems/*"].each do |gemdir|
+  next if gemdir == "." or gemdir == ".."
+  $:.unshift("#{gemdir}/lib")
+end
 
 # Load workflow engine library
 require 'workflowmgr/workflowengine'
diff --git a/sbin/rocotoserver b/sbin/rocotoserver
index 1a293b9..8f7ee4c 100755
--- a/sbin/rocotoserver
+++ b/sbin/rocotoserver
@@ -3,15 +3,12 @@
 # Get the base directory of the WFM installation
 __WFMDIR__=File.expand_path("../../",__FILE__)
 
-# Add include paths for WFM and libxml-ruby libraries
+# Add include paths for WFM and gem dependencies
 $:.unshift("#{__WFMDIR__}/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-date/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-parsedate/lib")
-$:.unshift("#{__WFMDIR__}/lib/libxml-ruby")
-$:.unshift("#{__WFMDIR__}/lib/sqlite3-ruby")
-$:.unshift("#{__WFMDIR__}/lib/SystemTimer")
-$:.unshift("#{__WFMDIR__}/lib/open4/lib")
-$:.unshift("#{__WFMDIR__}/lib/thread/lib")
+Dir["#{__WFMDIR__}/gems/gems/*"].each do |gemdir|
+  next if gemdir == "." or gemdir == ".."
+  $:.unshift("#{gemdir}/lib")
+end
 
 # Load workflow engine library
 require 'tmpdir'
diff --git a/sbin/rocotostat.rb b/sbin/rocotostat.rb
index f59a271..eb41a64 100755
--- a/sbin/rocotostat.rb
+++ b/sbin/rocotostat.rb
@@ -3,15 +3,12 @@
 # Get the base directory of the WFM installation
 __WFMDIR__=File.expand_path("../../",__FILE__)
 
-# Add include paths for WFM and libxml-ruby libraries
+# Add include paths for WFM and gem dependencies
 $:.unshift("#{__WFMDIR__}/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-date/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-parsedate/lib")
-$:.unshift("#{__WFMDIR__}/lib/libxml-ruby")
-$:.unshift("#{__WFMDIR__}/lib/sqlite3-ruby")
-$:.unshift("#{__WFMDIR__}/lib/SystemTimer")
-$:.unshift("#{__WFMDIR__}/lib/open4/lib")
-$:.unshift("#{__WFMDIR__}/lib/thread/lib")
+Dir["#{__WFMDIR__}/gems/gems/*"].each do |gemdir|
+  next if gemdir == "." or gemdir == ".."
+  $:.unshift("#{gemdir}/lib")
+end
 
 # Load workflow status library
 require 'wfmstat/statusengine'
diff --git a/sbin/rocotovacuum.rb b/sbin/rocotovacuum.rb
index bb70508..d589111 100755
--- a/sbin/rocotovacuum.rb
+++ b/sbin/rocotovacuum.rb
@@ -3,15 +3,12 @@
 # Get the base directory of the WFM installation
 __WFMDIR__=File.expand_path("../../",__FILE__)
 
-# Add include paths for WFM and libxml-ruby libraries
+# Add include paths for WFM and gem dependencies
 $:.unshift("#{__WFMDIR__}/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-date/lib")
-$:.unshift("#{__WFMDIR__}/lib/rubysl-parsedate/lib")
-$:.unshift("#{__WFMDIR__}/lib/libxml-ruby")
-$:.unshift("#{__WFMDIR__}/lib/sqlite3-ruby")
-$:.unshift("#{__WFMDIR__}/lib/SystemTimer")
-$:.unshift("#{__WFMDIR__}/lib/open4/lib")
-$:.unshift("#{__WFMDIR__}/lib/thread/lib")
+Dir["#{__WFMDIR__}/gems/gems/*"].each do |gemdir|
+  next if gemdir == "." or gemdir == ".."
+  $:.unshift("#{gemdir}/lib")
+end
 
 # Load workflow status library
 require 'workflowmgr/workflowengine'
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