Index: tcl/build.sh
==================================================================
--- tcl/build.sh
+++ tcl/build.sh
@@ -8,15 +8,24 @@
 if [ -z "${TCLVERS}" ]; then
 	echo 'ERROR: The TCLVERS environment variable is not set' >&2
 
 	exit 1
 fi
+
+case "${TCLVERS}" in
+	*:*)
+		TCLVERS_CLEAN="$(echo "${TCLVERS}" | sed 's@:@_@g')"
+		;;
+	*)
+		TCLVERS_CLEAN="${TCLVERS}"
+		;;
+esac
 
 SRC="src/tcl${TCLVERS}.tar.gz"
 SRCURL="http://prdownloads.sourceforge.net/tcl/tcl${TCLVERS}-src.tar.gz"
 SRCHASH='-'
-BUILDDIR="$(pwd)/build/tcl${TCLVERS}"
+BUILDDIR="$(pwd)/build/tcl${TCLVERS_CLEAN}"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHSCRIPTDIR="$(pwd)/patchscripts"
 PATCHDIR="$(pwd)/patches"
 export SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHSCRIPTDIR PATCHDIR
@@ -78,18 +87,18 @@
 			cd "${workdir}" || exit 1
 
 			# Handle Tcl first, since it will be used to base other packages on
 			download "http://core.tcl.tk/tcl/tarball/tcl-fossil.tar.gz?uuid=${FOSSILTAG}" "tmp-tcl.tar.gz" - || rm -f 'tmp-tcl.tar.gz'
 			gzip -dc 'tmp-tcl.tar.gz' | tar -xf -
-			mv "tcl-fossil" "tcl${TCLVERS}"
+			mv "tcl-fossil" "tcl${TCLVERS_CLEAN}"
 
 			# Determine date of this Tcl release and use that date for all other dependent packages
 			## Unless the release we are talking about is "trunk", in which case we use that everywhere
 			if [ "${FOSSILTAG}" = "trunk" ]; then
 				FOSSILDATE="${FOSSILTAG}"
 			else
-				FOSSILDATE="$(echo 'cd "tcl'"${TCLVERS}"'"; set file [lindex [glob *] 0]; file stat $file finfo; set date $finfo(mtime); set date [expr {$date + 1}]; puts [clock format $date -format {%Y-%m-%dT%H:%M:%S}]' | TZ='UTC' "${TCLSH_NATIVE}")"
+				FOSSILDATE="$(echo 'cd "tcl'"${TCLVERS_CLEAN}"'"; set file [lindex [glob *] 0]; file stat $file finfo; set date $finfo(mtime); set date [expr {$date + 1}]; puts [clock format $date -format {%Y-%m-%dT%H:%M:%S}]' | TZ='UTC' "${TCLSH_NATIVE}")"
 			fi
 
 			## If we are unable to determine the modification date, fall-back to the tag and hope for the best
 			if [ -z "${FOSSILDATE}" ]; then
 				FOSSILDATE="${FOSSILTAG}"
@@ -115,21 +124,21 @@
 
 			gzip -dc "tmp-itcl.tar.gz" | tar -xf -
 			gzip -dc "tmp-thread.tar.gz" | tar -xf -
 			gzip -dc "tmp-tclconfig.tar.gz" | tar -xf -
 
-			mkdir -p "tcl${TCLVERS}/pkgs/" >/dev/null 2>/dev/null
-			mv "itcl-fossil" "tcl${TCLVERS}/pkgs/itcl"
-			mv "thread-fossil" "tcl${TCLVERS}/pkgs/thread"
-			cp -r "tclconfig-fossil" "tcl${TCLVERS}/pkgs/itcl/tclconfig"
-			cp -r "tclconfig-fossil" "tcl${TCLVERS}/pkgs/thread/tclconfig"
-			mv "tclconfig-fossil" "tcl${TCLVERS}/tclconfig"
+			mkdir -p "tcl${TCLVERS_CLEAN}/pkgs/" >/dev/null 2>/dev/null
+			mv "itcl-fossil" "tcl${TCLVERS_CLEAN}/pkgs/itcl"
+			mv "thread-fossil" "tcl${TCLVERS_CLEAN}/pkgs/thread"
+			cp -r "tclconfig-fossil" "tcl${TCLVERS_CLEAN}/pkgs/itcl/tclconfig"
+			cp -r "tclconfig-fossil" "tcl${TCLVERS_CLEAN}/pkgs/thread/tclconfig"
+			mv "tclconfig-fossil" "tcl${TCLVERS_CLEAN}/tclconfig"
 
 			if [ "${_USE_TDBC}" = '1' ]; then
 				gzip -dc "tmp-tdbc.tar.gz" | tar -xf -
-				mv "tdbc-fossil/tdbc" "tcl${TCLVERS}/pkgs/tdbc"
-				mv "tdbc-fossil/tdbcsqlite3" "tcl${TCLVERS}/pkgs/tdbcsqlite3"
+				mv "tdbc-fossil/tdbc" "tcl${TCLVERS_CLEAN}/pkgs/tdbc"
+				mv "tdbc-fossil/tdbcsqlite3" "tcl${TCLVERS_CLEAN}/pkgs/tdbcsqlite3"
 			fi
 
 			if [ "${_USE_SQLITE}" = '1' ]; then
 				gzip -dc "tmp-sqlite3.tar.gz" | tar -xf -
 
@@ -150,14 +159,14 @@
 
 					sed 's@\.\./\.\./sqlite3\.c@./sqlite3.c@' generic/tclsqlite3.c > generic/tclsqlite3.c.new
 					cat generic/tclsqlite3.c.new > generic/tclsqlite3.c
 					rm -f generic/tclsqlite3.c.new
 				)
-				mv sqlite-fossil "tcl${TCLVERS}/pkgs/sqlite3" >/dev/null 2>/dev/null
+				mv sqlite-fossil "tcl${TCLVERS_CLEAN}/pkgs/sqlite3" >/dev/null 2>/dev/null
 			fi
 
-			tar -cf - "tcl${TCLVERS}" | gzip -c > "../../${SRC}"
+			tar -cf - "tcl${TCLVERS_CLEAN}" | gzip -c > "../../${SRC}"
 			echo "${FOSSILDATE}" > "../../${SRC}.date"
 
 			cd ..
 
 			rm -rf "${workdir}"

Index: tk/build.sh
==================================================================
--- tk/build.sh
+++ tk/build.sh
@@ -8,15 +8,24 @@
 if [ -z "${TCLVERS}" ]; then
 	echo 'ERROR: The TCLVERS environment variable is not set' >&2
 
 	exit 1
 fi
+
+case "${TCLVERS}" in
+	*:*)
+		TCLVERS_CLEAN="$(echo "${TCLVERS}" | sed 's@:@_@g')"
+		;;
+	*)
+		TCLVERS_CLEAN="${TCLVERS}"
+		;;
+esac
 
 SRC="src/tk${TCLVERS}.tar.gz"
 SRCURL="http://prdownloads.sourceforge.net/tcl/tk${TCLVERS}-src.tar.gz"
 SRCHASH='-'
-BUILDDIR="$(pwd)/build/tk${TCLVERS}"
+BUILDDIR="$(pwd)/build/tk${TCLVERS_CLEAN}"
 PATCHDIR="$(pwd)/patches"
 OUTDIR="$(pwd)/out"
 INSTDIR="$(pwd)/inst"
 PATCHSCRIPTDIR="$(pwd)/patchscripts"
 export SRC SRCURL BUILDDIR PATCHDIR OUTDIR INSTDIR PATCHSCRIPTDIR
@@ -100,13 +109,13 @@
 			if [ ! -s 'tmp-tk.tar.gz' ]; then
 				download "http://core.tcl.tk/tk/tarball/tk-fossil.tar.gz?uuid=${FOSSILDATE}" "tmp-tk.tar.gz" - || rm -f 'tmp-tk.tar.gz'
 				gzip -dc "tmp-tk.tar.gz" | tar -xf -
 			fi
 
-			mv "tk-fossil" "tk${TCLVERS}"
+			mv "tk-fossil" "tk${TCLVERS_CLEAN}"
                         
-			tar -cf - "tk${TCLVERS}" | gzip -c > "../../${SRC}"
+			tar -cf - "tk${TCLVERS_CLEAN}" | gzip -c > "../../${SRC}"
 
 			cd ..
 			rm -rf "${workdir}"
 		)
 	else