Description of problem:After last update aMSN is broken again.

Message from terminal:
Unable to open mixer /dev/mixer
Error in startup script: can't find package BWidget
    while executing
"package require BWidget"
    invoked from within
"if { $initialize_amsn == 1 } {

        if {![::picture::Loaded]} {
                if { [OnDarwin] } {
                        tk_messageBox -default ok -message "There's a problem loading a..."
    (file "gui.tcl" line 4)
    invoked from within
"source gui.tcl         "
    ("uplevel" body line 22)
    invoked from within
"uplevel \#0 {

        # amsncore.tcl is already loaded but we'll re-source it here in case we manually do reload_files
        source amsncore.tcl
        source audio.tc..."
    (procedure "reload_files" line 2)
    invoked from within
"reload_files"
    (file "/usr/bin/amsn" line 322)