--- portmain.tcl.orig	2008-11-04 09:06:00.000000000 -0500
+++ portmain.tcl	2008-12-01 13:30:48.000000000 -0500
@@ -42,10 +42,11 @@
 # define options
 options prefix name version revision epoch categories maintainers
 options long_description description homepage
+options poison_version
 options worksrcdir filesdir distname portdbpath libpath distpath sources_conf os.platform os.version os.major os.arch os.endian platforms default_variants install.user install.group macosx_deployment_target
 
 # Export options via PortInfo
-options_export name version revision epoch categories maintainers platforms description long_description homepage
+options_export name version revision epoch categories maintainers platforms description long_description homepage poison_version
 
 # Assign option procedure to default_variants
 option_proc default_variants handle_default_variants
@@ -68,6 +69,7 @@
 default worksrcdir {$distname}
 default filespath {[file join $portpath $filesdir]}
 default worksrcpath {[file join $workpath $worksrcdir]}
+default poison_version 0
 
 # Configure settings
 default install.user {${portutil::autoconf::install_user}}