Index: library/lib/nx-shell.tcl
===================================================================
diff -u -r3ee0ac91f0a8034ec4739bc2af1016cdf30fbe57 -rda0791d69d82e31dcd2575925f832be2b50e38de
--- library/lib/nx-shell.tcl	(.../nx-shell.tcl)	(revision 3ee0ac91f0a8034ec4739bc2af1016cdf30fbe57)
+++ library/lib/nx-shell.tcl	(.../nx-shell.tcl)	(revision da0791d69d82e31dcd2575925f832be2b50e38de)
@@ -27,7 +27,7 @@
   :protected object method evalScript {-exit:switch script} {
     set script [list catch [string trim $script] [current]::result [current]::opts]
     set r [uplevel #0 $script]
-    if {$r} {
+    if {$r == 1} {
       puts stderr [dict get ${:opts} -errorinfo]
       if {$exit} {
         exit 1