if {![package vsatisfies [package provide Tcl] 8.5]} {return}

package ifneeded tcl::chan::fifo 1       [list source [list [file join $dir fifo.tcl]]]
package ifneeded tcl::chan::fifo2 1      [list source [list [file join $dir fifo2.tcl]]]
package ifneeded tcl::chan::halfpipe 1   [list source [list [file join $dir halfpipe.tcl]]]
package ifneeded tcl::chan::memchan 1    [list source [list [file join $dir memchan.tcl]]]
package ifneeded tcl::chan::null 1       [list source [list [file join $dir null.tcl]]]
package ifneeded tcl::chan::nullzero 1   [list source [list [file join $dir nullzero.tcl]]]
package ifneeded tcl::chan::random 1     [list source [list [file join $dir random.tcl]]]
package ifneeded tcl::chan::string 1     [list source [list [file join $dir string.tcl]]]
package ifneeded tcl::chan::textwindow 1 [list source [list [file join $dir textwindow.tcl]]]
package ifneeded tcl::chan::variable 1   [list source [list [file join $dir variable.tcl]]]
package ifneeded tcl::chan::zero 1       [list source [list [file join $dir zero.tcl]]]
package ifneeded tcl::randomseed 1       [list source [list [file join $dir randseed.tcl]]]