set pkginfo [lindex $pkgdata($extension) 0]

			set ver [lindex $pkginfo 0]
			set arch [lindex $pkginfo 1]
			set server [lindex $pkginfo 2]

			set safe_ext_name [string map [list ":" "_"] $extension]

			set pkgdir [file join $rootdir ${safe_ext_name}$ver]
			file mkdir $pkgdir $::teapotclient::pkgcachedir

			set url "http://$server/package/name/$extension/ver/$ver/arch/$arch/file"
			set urlcachefile [file join $::teapotclient::pkgcachedir [::md5::md5 -hex $url]]

			if {![file exists $urlcachefile]} {
				set tmpfd [open $urlcachefile w]

						}
						close $fd
					}
				}
				"(^| )text($| )" {
					unset -nocomplain fd

					set extfile [file join $pkgdir ${safe_ext_name}.tcl]
					set idxfile [file join $pkgdir pkgIndex.tcl]

					catch {
						file copy -force -- $urlcachefile $extfile

						set fd [open $idxfile w]
						puts $fd "package ifneeded $extension $ver \[list source \[file join \$dir [file tail $extfile]\]\]"