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-rw-r--r--library/opt/pkgIndex.tcl3
1 files changed, 2 insertions, 1 deletions
diff --git a/library/opt/pkgIndex.tcl b/library/opt/pkgIndex.tcl
index 2de9531..02c289c 100644
--- a/library/opt/pkgIndex.tcl
+++ b/library/opt/pkgIndex.tcl
@@ -8,4 +8,5 @@
# script is sourced, the variable $dir must contain the
# full path name of this file's directory.
-package ifneeded opt 0.4.2 [list source [file join $dir optparse.tcl]]
+if {![package vsatisfies [package provide Tcl] 8]} {return}
+package ifneeded opt 0.4.3 [list source [file join $dir optparse.tcl]]