Index: dbus/build.sh
==================================================================
--- dbus/build.sh
+++ dbus/build.sh
@@ -19,10 +19,11 @@
 # The dbus package
 
 DBUSVERS="2.0"
 SRC="src/dbus-${DBUSVERS}.tar.gz"
 SRCURL="http://sourceforge.net/projects/dbus-tcl/files/dbus/${DBUSVERS}/dbus-${DBUSVERS}.tar.gz/download"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/dbus-${DBUSVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export DBUSVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
@@ -35,11 +36,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: itcl/build.sh
==================================================================
--- itcl/build.sh
+++ itcl/build.sh
@@ -13,10 +13,11 @@
 
 ITCLVERS="3.4.2"
 ITCLVERSEXTRA=""
 SRC="src/itcl-${ITCLVERS}.tar.gz"
 SRCURL="http://sourceforge.net/projects/incrtcl/files/%5BIncr%20Tcl_Tk%5D-source/${ITCLVERS}/itcl${ITCLVERS}${ITCLVERSEXTRA}.tar.gz/download"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/itcl${ITCLVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export ITCLVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
@@ -57,11 +58,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: mk4tcl/build.sh
==================================================================
--- mk4tcl/build.sh
+++ mk4tcl/build.sh
@@ -13,10 +13,11 @@
 
 MK4VERS="2.4.9.7"
 SRC="src/metakit-${MK4VERS}.tar.gz"
 SRCURL="http://www.equi4.com/pub/mk/metakit-${MK4VERS}.tar.gz"
 SRCURL="http://pkgs.fedoraproject.org/repo/pkgs/metakit/metakit-${MK4VERS}.tar.gz/17330257376eea657827ed632ea62c9e/metakit-${MK4VERS}.tar.gz"
+SRCHASH='d1ba361d2d8517925cff5c23e8602822da9c8c347a75a15c225ec656ff7ca94d'
 BUILDDIR="$(pwd)/build/metakit-${MK4VERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export MK4VERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
@@ -40,11 +41,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: nsf/build.sh
==================================================================
--- nsf/build.sh
+++ nsf/build.sh
@@ -13,10 +13,11 @@
 
 NSFVERS="2.0.0"
 NSFVERSEXTRA=""
 SRC="src/nsf${NSFVERS}.tar.gz"
 SRCURL="http://sourceforge.net/projects/next-scripting/files/${NSFVERS}/nsf${NSFVERS}.tar.gz/download"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/nsf${NSFVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export NSFVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
@@ -32,11 +33,11 @@
 
 if [ ! -f "${SRC}" ]; then
     mkdir 'src' >/dev/null 2>/dev/null
     
     if [ ! -d 'buildsrc' ]; then
-	download "${SRCURL}" "${SRC}" - || exit 1
+	download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
     fi
 fi
 
 (
     cd 'build' || exit 1

Index: tcc4tcl/build.sh
==================================================================
--- tcc4tcl/build.sh
+++ tcc4tcl/build.sh
@@ -12,10 +12,11 @@
 fi
 
 TCC4TCLVERS="0.23"
 SRC="src/tcc4tcl-${TCC4TCLVERS}.tar.gz"
 SRCURL="http://rkeene.org/devel/tcc4tcl/tcc4tcl-${TCC4TCLVERS}.tar.gz"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/tcc4tcl-${TCC4TCLVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TCC4TCLVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
@@ -38,11 +39,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}.tmp" - || exit 1
+		download "${SRCURL}" "${SRC}.tmp" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: tcl/build.sh
==================================================================
--- tcl/build.sh
+++ tcl/build.sh
@@ -11,16 +11,23 @@
 	exit 1
 fi
 
 SRC="src/tcl${TCLVERS}.tar.gz"
 SRCURL="http://prdownloads.sourceforge.net/tcl/tcl${TCLVERS}-src.tar.gz"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/tcl${TCLVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHSCRIPTDIR="$(pwd)/patchscripts"
 PATCHDIR="$(pwd)/patches"
 export SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHSCRIPTDIR PATCHDIR
+
+case "${TCLVERS}" in
+	8.6.4)
+		SRCHASH='9e6ed94c981c1d0c5f5fefb8112d06c6bf4d050a7327e95e71d417c416519c8d'
+		;;
+esac
 
 # Set configure options for this sub-project
 LDFLAGS="${LDFLAGS} ${KC_TCL_LDFLAGS}"
 CFLAGS="${CFLAGS} ${KC_TCL_CFLAGS}"
 CPPFLAGS="${CPPFLAGS} ${KC_TCL_CPPFLAGS}"
@@ -149,11 +156,11 @@
 
 			rm -rf "${workdir}"
 		) || exit 1
 	else
 		if [ ! -d 'buildsrc' ]; then
-			download "${SRCURL}" "${SRC}" - || (
+			download "${SRCURL}" "${SRC}" "${SRCHASH}" || (
 				echo '  Unable to download source code for Tcl.' >&4
 				echo '  Aborting Tcl -- further packages will likely also fail.' >&4
 
 				exit 1
 			) || exit 1

Index: tcllib/build.sh
==================================================================
--- tcllib/build.sh
+++ tcllib/build.sh
@@ -1,10 +1,11 @@
 #! /usr/bin/env bash
 
 TCLLIB_VERS='1.16'
 SRC="src/tcllib-${TCLLIB_VERS}.tar.bz2"
 SRCURL="http://sourceforge.net/projects/tcllib/files/tcllib/${TCLLIB_VERS}/tcllib-${TCLLIB_VERS}.tar.bz2"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/Tcllib-${TCLLIB_VERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TCLLIB_VERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
@@ -14,11 +15,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: tclvfs/build.sh
==================================================================
--- tclvfs/build.sh
+++ tclvfs/build.sh
@@ -12,10 +12,11 @@
 fi
 
 TCLVFSVERS="20080503"
 SRC="src/tclvfs-${TCLVFSVERS}.tar.gz"
 SRCURL="http://sourceforge.net/projects/tclvfs/files/tclvfs/tclvfs-${TCLVFSVERS}/tclvfs-${TCLVFSVERS}.tar.gz/download"
+SRCHASH='0d90362078c8f59347b14be377e9306336b6d25d147397f845e705a6fa1d38f2'
 BUILDDIR="$(pwd)/build/tclvfs-${TCLVFSVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TCLVFSVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
@@ -38,11 +39,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: tclx/build.sh
==================================================================
--- tclx/build.sh
+++ tclx/build.sh
@@ -12,10 +12,11 @@
 fi
 
 TCLXVERS="8.4.1"
 SRC="src/tclx${TCLXVERS}.tar.bz2"
 SRCURL="http://sourceforge.net/projects/tclx/files/TclX/${TCLXVERS}/tclx${TCLXVERS}.tar.bz2/download"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/tclx8.4"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TCLXVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
@@ -38,11 +39,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: thread/build.sh
==================================================================
--- thread/build.sh
+++ thread/build.sh
@@ -12,10 +12,11 @@
 fi
 
 THREADVERS="2.7.2"
 SRC="src/thread-${THREADVERS}.tar.gz"
 SRCURL="http://sourceforge.net/projects/tcl/files/Thread%20Extension/${THREADVERS}/thread${THREADVERS}.tar.gz/download"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/thread${THREADVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export THREADVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
@@ -56,11 +57,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: tk/build.sh
==================================================================
--- tk/build.sh
+++ tk/build.sh
@@ -11,16 +11,23 @@
 	exit 1
 fi
 
 SRC="src/tk${TCLVERS}.tar.gz"
 SRCURL="http://prdownloads.sourceforge.net/tcl/tk${TCLVERS}-src.tar.gz"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/tk${TCLVERS}"
 PATCHDIR="$(pwd)/patches"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHSCRIPTDIR="$(pwd)/patchscripts"
 export SRC SRCURL BUILDDIR PATCHDIR OUTDIR INSTDIR PATCHSCRIPTDIR
+
+case "${TCLVERS}" in
+	8.6.4)
+		SRCHASH='08f99df85e5dc9c4271762163c6aabb962c8b297dc5c4c1af8bdd05fc2dd26c1'
+		;;
+esac
 
 # Set configure options for this sub-project
 LDFLAGS="${LDFLAGS} ${KC_TK_LDFLAGS}"
 CFLAGS="${CFLAGS} ${KC_TK_CFLAGS}"
 CPPFLAGS="${CPPFLAGS} ${KC_TK_CPPFLAGS}"
@@ -96,11 +103,11 @@
 			cd ..
 			rm -rf "${workdir}"
 		)
 	else
 		if [ ! -d 'buildsrc' ]; then
-			download "${SRCURL}" "${SRC}" - || exit 1
+			download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 		fi
 	fi
 fi
 
 (

Index: tls/build.sh
==================================================================
--- tls/build.sh
+++ tls/build.sh
@@ -12,10 +12,11 @@
 fi
 
 TLSVERS="1.6.7"
 SRC="src/tls-${TLSVERS}.tar.gz"
 SRCURL="http://sourceforge.net/projects/tls/files/tls/${TLSVERS}/tls${TLSVERS}-src.tar.gz"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/tls${TLSVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TLSVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
@@ -38,11 +39,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: udp/build.sh
==================================================================
--- udp/build.sh
+++ udp/build.sh
@@ -12,10 +12,11 @@
 fi
 
 TCLUDPVERS="1.0.11"
 SRC="src/tcludp-${TCLUDPVERS}.tar.gz"
 SRCURL="http://sourceforge.net/projects/tcludp/files/tcludp/${TCLUDPVERS}/tcludp-${TCLUDPVERS}.tar.gz"
+SRCHASH='-'
 BUILDDIR="$(pwd)/build/tcludp"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
 export TCLUDPVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHDIR
@@ -38,11 +39,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: yajltcl/build.sh
==================================================================
--- yajltcl/build.sh
+++ yajltcl/build.sh
@@ -14,11 +14,13 @@
 YAJLTCLVERS="1.5"
 YAJLVERS='2.1.0'
 SRC="src/yajltcl-${YAJLTCLVERS}.tar.gz"
 YAJLSRC="src/yajl-${YAJLVERS}.tar.gz"
 SRCURL="https://github.com/flightaware/yajl-tcl/archive/v${YAJLTCLVERS}.tar.gz"
+SRCHASH='-'
 YAJLSRCURL="http://github.com/lloyd/yajl/tarball/${YAJLVERS}"
+YAJLSRCHASH='-'
 BUILDDIR="$(pwd)/build/yajl-tcl-${YAJLTCLVERS}"
 YAJLBUILDDIR="$(pwd)/build/lloyd-yajl-66cb08c"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHDIR="$(pwd)/patches"
@@ -36,15 +38,15 @@
 
 if [ ! -d 'buildsrc' ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -f "${SRC}" ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 
 	if [ ! -f "${YAJLSRC}" ]; then
-		download "${YAJLSRCURL}" "${YAJLSRC}" - || exit 1
+		download "${YAJLSRCURL}" "${YAJLSRC}" "${YAJLSRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1

Index: zlib/build.sh
==================================================================
--- zlib/build.sh
+++ zlib/build.sh
@@ -12,10 +12,11 @@
 fi
 
 ZLIBVERS="1.2.8"
 SRC="src/zlib-${ZLIBVERS}.tar.gz"
 SRCURL="http://sourceforge.net/projects/libpng/files/zlib/${ZLIBVERS}/zlib-${ZLIBVERS}.tar.gz/download"
+SRCHASH='36658cb768a54c1d4dec43c3116c27ed893e88b02ecfcb44f2166f9c0b7f2a0d'
 BUILDDIR="$(pwd)/build/zlib-${ZLIBVERS}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 export ZLIBVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
 
@@ -31,11 +32,11 @@
 
 if [ ! -f "${SRC}" ]; then
 	mkdir 'src' >/dev/null 2>/dev/null
 
 	if [ ! -d 'buildsrc' ]; then
-		download "${SRCURL}" "${SRC}" - || exit 1
+		download "${SRCURL}" "${SRC}" "${SRCHASH}" || exit 1
 	fi
 fi
 
 (
 	cd 'build' || exit 1