can't read "dir": no such variable
    while executing
"file join $dir aycock-build.tcl"
    (in namespace eval "::request" script line 4)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
if {![package vsatisfies [package provide Tcl] 8.5]} {return}

package ifneeded grammar::aycock 1.0 \
    [list source [file join $dir aycock-build.tcl]]
package ifneeded grammar::aycock::debug 1.0 \
    [list source [file join $dir aycock-debug.tcl]]
package ifneeded grammar::aycock::runtime 1.0 \
    [list source [file join $dir aycock-runtime.tcl]]