diff --git a/BLFS/envars.conf b/BLFS/envars.conf
index b857443..ec87324 100644
--- a/BLFS/envars.conf
+++ b/BLFS/envars.conf
@@ -11,22 +11,22 @@
 #======== Common envars ==========
 
 #--- The build directory:
-#    - If BUILD_SUBDIRS is set, this directory contains sub directories
+#    - If JH_BUILD_SUBDIRS is set, this directory contains sub directories
 #      (one for each package), where packages are unpacked, and compiled.
-#    - If BUILD_SUBDIRS is unset, packages are unpacked, and compiled directly
-#      in $BUILD_ROOT.
-export BUILD_ROOT=/sources
-export BUILD_SUBDIRS=1
+#    - If JH_BUILD_SUBDIRS is unset, packages are unpacked, and compiled
+#      directly in $JH_BUILD_ROOT.
+export JH_BUILD_ROOT=/sources
+export JH_BUILD_SUBDIRS=1
 
 #--- The local repository for packages/file:
 #    Any missing file will be downloaded and archived either:
-#    - into a subdirectory (one for each page of the book) fo this directory,
-#      if SRC_SUBDIRS is set.
-#    - directly into this directory if SRC_SUBDIRS is unset.
-#    This directory can be the same as $BUILD_ROOT, provided BUILD_SUBDIRS
-#    and SRC_SUBDIRS are different.
-export SRC_ARCHIVE=/sources
-unset  SRC_SUBDIRS
+#    - into a subdirectory (one for each page of the book) of this directory,
+#      if JH_SRC_SUBDIRS is set.
+#    - directly into this directory if JH_SRC_SUBDIRS is unset.
+#    This directory can be the same as $JH_BUILD_ROOT, provided JH_BUILD_SUBDIRS
+#    and JH_SRC_SUBDIRS are different.
+export JH_SRC_ARCHIVE=/sources
+unset  JH_SRC_SUBDIRS
 
 #--- Set a well-known working locale when building software
 # Note that an UTF-8 locale may be needed for some packages,
@@ -43,13 +43,13 @@ unset  SRC_SUBDIRS
 # The server path MUST be set as listed in
 # http://www.linuxfromscratch.org/blfs/download.html.
 # Note that despite the name of the variable, it can be an http url.
-export FTP_SERVER=http://ftp.osuosl.org/pub/blfs/
+export JH_FTP_SERVER=http://ftp.osuosl.org/pub/blfs/
 
 #--- Keep the buid directory to examine it:
-#    If KEEP_FILES is unset, the extracted tarball is removed after build.
+#    If JH_KEEP_FILES is unset, the extracted tarball is removed after build.
 #    Otherwise, the build tree is kept for later study.
-#export KEEP_FILES=1
-unset KEEP_FILES
+#export JH_KEEP_FILES=1
+unset JH_KEEP_FILES
 
 ### Currently not used in scripts ###
 # Use a server close to you for Xorg (see http://wiki.x.org/wiki/Mirrors)
@@ -98,4 +98,4 @@ if [ -r /etc/profile ]; then source /etc/profile; fi
 # where the functions are defined, and we'll source it just before
 # installing.
 
-export PACK_INSTALL=/blfs_root/packInstall.sh # change as needed
+export JH_PACK_INSTALL=/blfs_root/packInstall.sh # change as needed
diff --git a/BLFS/xsl/scripts.xsl b/BLFS/xsl/scripts.xsl
index ba38e3e..5e2fa67 100644
--- a/BLFS/xsl/scripts.xsl
+++ b/BLFS/xsl/scripts.xsl
@@ -87,11 +87,11 @@ done
             <!-- We build in a subdirectory, whose name may be needed
                  if using package management (see envars.conf), so
                  "export" it -->
-            <xsl:text>export PKG_DIR=</xsl:text>
+            <xsl:text>export JH_PKG_DIR=</xsl:text>
             <xsl:value-of select="$filename"/>
             <xsl:text>
-SRC_DIR=${SRC_ARCHIVE}${SRC_SUBDIRS:+/${PKG_DIR}}
-BUILD_DIR=${BUILD_ROOT}${BUILD_SUBDIRS:+/${PKG_DIR}}
+SRC_DIR=${JH_SRC_ARCHIVE}${JH_SRC_SUBDIRS:+/${JH_PKG_DIR}}
+BUILD_DIR=${JH_BUILD_ROOT}${JH_BUILD_SUBDIRS:+/${JH_PKG_DIR}}
 mkdir -p $SRC_DIR
 mkdir -p $BUILD_DIR
 
@@ -100,13 +100,13 @@ mkdir -p $BUILD_DIR
             <xsl:apply-templates select="sect2"/>
             <!-- Clean-up -->
             <xsl:text>cd $BUILD_DIR
-[[ -n "$KEEP_FILES" ]] || </xsl:text>
+[[ -n "$JH_KEEP_FILES" ]] || </xsl:text>
             <!-- In some case, some files in the build tree are owned
                  by root -->
             <xsl:if test="$sudo='y'">
               <xsl:text>sudo </xsl:text>
             </xsl:if>
-            <xsl:text>rm -rf $UNPACKDIR unpacked&#xA;&#xA;</xsl:text>
+            <xsl:text>rm -rf $JH_UNPACKDIR unpacked&#xA;&#xA;</xsl:text>
           </xsl:when>
           <!-- Non-package page -->
           <xsl:otherwise>
@@ -143,31 +143,31 @@ find . -maxdepth 1 -mindepth 1 -type d | xargs </xsl:text>
 case $PACKAGE in
   *.tar.gz|*.tar.bz2|*.tar.xz|*.tgz|*.tar.lzma)
      tar -xvf $SRC_DIR/$PACKAGE &gt; unpacked
-     UNPACKDIR=`grep '[^./]\+' unpacked | head -n1 | sed 's@^\./@@;s@/.*@@'`
+     JH_UNPACKDIR=`grep '[^./]\+' unpacked | head -n1 | sed 's@^\./@@;s@/.*@@'`
      ;;
   *.tar.lz)
      bsdtar -xvf $SRC_DIR/$PACKAGE 2&gt; unpacked
-     UNPACKDIR=`head -n1 unpacked | cut  -d" " -f2 | sed 's@^\./@@;s@/.*@@'`
+     JH_UNPACKDIR=`head -n1 unpacked | cut  -d" " -f2 | sed 's@^\./@@;s@/.*@@'`
      ;;
   *.zip)
      zipinfo -1 $SRC_DIR/$PACKAGE &gt; unpacked
-     UNPACKDIR="$(sed 's@/.*@@' unpacked | uniq )"
-     if test $(wc -w &lt;&lt;&lt; $UNPACKDIR) -eq 1; then
+     JH_UNPACKDIR="$(sed 's@/.*@@' unpacked | uniq )"
+     if test $(wc -w &lt;&lt;&lt; $JH_UNPACKDIR) -eq 1; then
        unzip $SRC_DIR/$PACKAGE
      else
-       UNPACKDIR=${PACKAGE%.zip}
-       unzip -d $UNPACKDIR $SRC_DIR/$PACKAGE
+       JH_UNPACKDIR=${PACKAGE%.zip}
+       unzip -d $JH_UNPACKDIR $SRC_DIR/$PACKAGE
      fi
      ;;
   *)
-     UNPACKDIR=$PKG_DIR-build
-     mkdir $UNPACKDIR
-     cp $SRC_DIR/$PACKAGE $UNPACKDIR
-     cp $(find . -mindepth 1 -maxdepth 1 -type l) $UNPACKDIR
+     JH_UNPACKDIR=$JH_PKG_DIR-build
+     mkdir $JH_UNPACKDIR
+     cp $SRC_DIR/$PACKAGE $JH_UNPACKDIR
+     cp $(find . -mindepth 1 -maxdepth 1 -type l) $JH_UNPACKDIR
      ;;
 esac
-export UNPACKDIR
-cd $UNPACKDIR&#xA;
+export JH_UNPACKDIR
+cd $JH_UNPACKDIR&#xA;
 </xsl:text>
         <xsl:apply-templates select=".//screen | .//para/command"/>
         <xsl:if test="$sudo = 'y'">
@@ -241,10 +241,10 @@ cd $UNPACKDIR&#xA;
     <xsl:text>&#xA;if [[ ! -f $</xsl:text>
     <xsl:value-of select="$varname"/>
     <xsl:text> ]] ; then
-  if [[ -f $SRC_ARCHIVE/$</xsl:text>
+  if [[ -f $JH_SRC_ARCHIVE/$</xsl:text>
     <xsl:value-of select="$varname"/>
     <xsl:text> ]] ; then&#xA;</xsl:text>
-    <xsl:text>    cp $SRC_ARCHIVE/$</xsl:text>
+    <xsl:text>    cp $JH_SRC_ARCHIVE/$</xsl:text>
     <xsl:value-of select="$varname"/>
     <xsl:text> $</xsl:text>
     <xsl:value-of select="$varname"/>
@@ -263,14 +263,11 @@ cd $UNPACKDIR&#xA;
       <xsl:text> ||&#xA;</xsl:text>
     </xsl:if>
     <!-- The FTP_SERVER mirror as a last resort -->
-    <xsl:text>    wget -T 30 -t 5 ${FTP_SERVER}svn/</xsl:text>
+    <xsl:text>    wget -T 30 -t 5 ${JH_FTP_SERVER}svn/</xsl:text>
     <xsl:value-of select="$first_letter"/>
     <xsl:text>/$</xsl:text>
     <xsl:value-of select="$varname"/>
-    <xsl:text><!--
-    cp $</xsl:text>
-    <xsl:value-of select="$varname"/>
-    <xsl:text> $SRC_ARCHIVE-->
+    <xsl:text>
   fi
 fi
 </xsl:text>
@@ -431,8 +428,8 @@ fi
             </xsl:if>
             <xsl:if test="$wrap-install = 'y' and
                           ancestor::sect2[@role='installation']">
-              <xsl:text>if [ -r "$PACK_INSTALL" ]; then
-  source $PACK_INSTALL
+              <xsl:text>if [ -r "$JH_PACK_INSTALL" ]; then
+  source $JH_PACK_INSTALL
   export -f wrapInstall
   export -f packInstall
 fi
@@ -471,8 +468,8 @@ wrapInstall '
     <xsl:text>BOOTPKG_DIR=blfs-</xsl:text>
     <xsl:copy-of select="$bootpkg"/>
     <xsl:text>
-BOOTSRC_DIR=${SRC_ARCHIVE}${SRC_SUBDIRS:+/${BOOTPKG_DIR}}
-BOOTBUILD_DIR=${BUILD_ROOT}${BUILD_SUBDIRS:+/${BOOTPKG_DIR}}
+BOOTSRC_DIR=${JH_SRC_ARCHIVE}${JH_SRC_SUBDIRS:+/${BOOTPKG_DIR}}
+BOOTBUILD_DIR=${JH_BUILD_ROOT}${JH_BUILD_SUBDIRS:+/${BOOTPKG_DIR}}
 mkdir -p $BOOTSRC_DIR
 mkdir -p $BOOTBUILD_DIR
 
@@ -482,8 +479,8 @@ URL=</xsl:text>
     <xsl:text>
 BOOTPACKG=$(basename $URL)
 if [[ ! -f $BOOTPACKG ]] ; then
-  if [[ -f $SRC_ARCHIVE/$BOOTPACKG ]] ; then
-    cp $SRC_ARCHIVE/$BOOTPACKG $BOOTPACKG
+  if [[ -f $JH_SRC_ARCHIVE/$BOOTPACKG ]] ; then
+    cp $JH_SRC_ARCHIVE/$BOOTPACKG $BOOTPACKG
   else
     wget -T 30 -t 5 $URL
   fi
diff --git a/README.BLFS b/README.BLFS
index 41b9194..b5e78c1 100644
--- a/README.BLFS
+++ b/README.BLFS
@@ -265,8 +265,8 @@ Working files: several files are generated when first running the tool
 
        IMPORTANT: Review and edit envars.conf, at least after installing the
     tool. This file is used to set global envars needed by the build scripts.
-    If you use package management, the variable PACK_INSTALL should point to
-    where the packInstall.sh script resides.
+    If you use package management, the variable JH_PACK_INSTALL should point to
+    the directory where the packInstall.sh script resides.
 
   4.4  CREATING THE MAKEFILE::
 
diff --git a/common/libs/func_install_blfs b/common/libs/func_install_blfs
index d8ee939..e86d9e2 100644
--- a/common/libs/func_install_blfs
+++ b/common/libs/func_install_blfs
@@ -13,8 +13,8 @@ cp -r menu ${BUILDDIR}${BLFS_ROOT}
 cp $COMMON_DIR/progress_bar.sh ${BUILDDIR}${BLFS_ROOT}
 cp README.BLFS ${BUILDDIR}${BLFS_ROOT}
 if [ "$WRAP_INSTALL" = y ]; then
-  sed -e 's/PKGDIR/UNPACKDIR/' \
-      -e 's/PKG_DEST/PKG_DIR/' \
+  sed -e 's/PKGDIR/JH_UNPACKDIR/' \
+      -e 's/PKG_DEST/JH_PKG_DIR/' \
       $PKGMNGTDIR/packInstall.sh > ${BUILDDIR}${BLFS_ROOT}/packInstall.sh
 fi
 
@@ -144,17 +144,17 @@ mv scripts $BUILDDIR$BLFS_ROOT
 # Generates a list containing download and copying instructions for tarballs
 echo -e '#!/bin/bash\nset -e\n' > $BUILDDIR$BLFS_ROOT/download_script
 sed -n -e '/PACKAGE=/,/^fi/{/^fi/a\
-cp $PACKAGE $SRC_ARCHIVE
+cp $PACKAGE $JH_SRC_ARCHIVE
 p}' \
        -e '/|[ ]*md5sum/p' \
        -e '/PACKAGE1=/,/^fi/{/^fi/a\
-cp $PACKAGE1 $SRC_ARCHIVE
+cp $PACKAGE1 $JH_SRC_ARCHIVE
 p}' \
        -e '/PATCH=/,/^fi/{/^fi/a\
-cp $PATCH $SRC_ARCHIVE
+cp $PATCH $JH_SRC_ARCHIVE
 p}' \
        -e '/URL=/,/^fi/{/^fi/a\
-cp $BOOTPACKG $SRC_ARCHIVE
+cp $BOOTPACKG $JH_SRC_ARCHIVE
 p}' \
     $BUILDDIR$BLFS_ROOT/scripts/* >> $BUILDDIR$BLFS_ROOT/download_script
 chmod u+x $BUILDDIR$BLFS_ROOT/download_script
@@ -164,8 +164,8 @@ pushd $BUILDDIR/sources
 # Remove `unpacked' files if some have been left
 sudo find . -name unpacked -exec rm \{\} \;
 if [ "$GETPKG" = "y" ]; then
-    FTP_SERVER=$SERVER/pub/blfs/ \
-    SRC_ARCHIVE=${SRC_ARCHIVE:-/dev/null}     \
+    JH_FTP_SERVER=$SERVER/pub/blfs/ \
+    JH_SRC_ARCHIVE=${SRC_ARCHIVE:-/dev/null}     \
     $BUILDDIR$BLFS_ROOT/download_script
 else # Save the download script in case the user wants to run it later
     cp $BUILDDIR$BLFS_ROOT/download_script .
diff --git a/pkgmngt/packInstall.sh.porg b/pkgmngt/packInstall.sh.porg
index 3a906f2..90af859 100644
--- a/pkgmngt/packInstall.sh.porg
+++ b/pkgmngt/packInstall.sh.porg
@@ -22,31 +22,31 @@ case $1 in
     VERSION=$(echo $1 | sed 's/.*shot-//')
     ;;
   icu*) # No version in PCKGVRS! Use version directly from xml book.
-        # PACK_INSTALL contains the path to this script, which is in the
+        # JH_PACK_INSTALL contains the path to this script, which is in the
         # parent dir of the book.
-    local PACKENT=$(dirname $PACK_INSTALL)/blfs-xml/packages.ent
+    local PACKENT=$(dirname $JH_PACK_INSTALL)/blfs-xml/packages.ent
     local VERSION1=$(sed -n 's/.*icu-major[^0-9]*\([^"]*\).*/\1/p' $PACKENT)
     local VERSION2=$(sed -n 's/.*icu-minor[^0-9]*\([^"]*\).*/\1/p' $PACKENT)
     VERSION=$VERSION1.$VERSION2
     ;;
   exiv*)
-    local PACKENT=$(dirname $PACK_INSTALL)/blfs-xml/packages.ent
+    local PACKENT=$(dirname $JH_PACK_INSTALL)/blfs-xml/packages.ent
     VERSION=$(sed -n 's/.*exiv2[^0-9]*\([^"]*\).*/\1/p' $PACKENT)
     ;;
   flashplayer*)
-    local PACKENT=$(dirname $PACK_INSTALL)/blfs-xml/packages.ent
+    local PACKENT=$(dirname $JH_PACK_INSTALL)/blfs-xml/packages.ent
     VERSION=$(sed -n 's/.*flashplayer[^0-9]*\([^"]*\).*/\1/p' $PACKENT)
     ;;
   soundtouch*)
-    local PACKENT=$(dirname $PACK_INSTALL)/blfs-xml/packages.ent
+    local PACKENT=$(dirname $JH_PACK_INSTALL)/blfs-xml/packages.ent
     VERSION=$(sed -n 's/.*soundtouch[^0-9]*\([^"]*\).*/\1/p' $PACKENT)
     ;;
   xvid*)
-    local PACKENT=$(dirname $PACK_INSTALL)/blfs-xml/packages.ent
+    local PACKENT=$(dirname $JH_PACK_INSTALL)/blfs-xml/packages.ent
     VERSION=$(sed -n 's/.*xvid[^0-9]*\([^"]*\).*/\1/p' $PACKENT)
     ;;
   xf86-video-intel)
-    local PACKENT=$(dirname $PACK_INSTALL)/blfs-xml/x/installing/x7driver-intel.xml
+    local PACKENT=$(dirname $JH_PACK_INSTALL)/blfs-xml/x/installing/x7driver-intel.xml
     VERSION=$(sed -n '/<!--/!s/.*-version[^;][^0-9]*\([^"]*\).*/\1/p' $PACKENT)
     ;;
   jdk8*)