Index: nxwish.in
===================================================================
diff -u -rb111807bd1e55f1975df2fc34bfef692989d61a3 -rf6b33f642a1d30f8d7b44c556c86302f8539be3c
--- nxwish.in	(.../nxwish.in)	(revision b111807bd1e55f1975df2fc34bfef692989d61a3)
+++ nxwish.in	(.../nxwish.in)	(revision f6b33f642a1d30f8d7b44c556c86302f8539be3c)
@@ -1,7 +1,15 @@
-#! /usr/bin/env tclsh
-#! @NSF_COMPATIBLE_TCLSH@
+#! /bin/sh
+# Lookup a Tcl interpreter \
+    INTERP="tclsh@TCL_VERSION@"; \
+    INTERPS="@NSF_COMPATIBLE_TCLSH@ @TCL_EXEC_PREFIX@/bin/$INTERP"; \
+    for interp in $INTERPS; \
+    do if [ -x $interp ]; then INTERP=$interp; break; \
+    fi;  done; \
+    exec $INTERP "$0" ${1+"$@"}
+
 # -*- tcl -*-
 puts  [info nameofexecutable]
+
 #
 # Tiny scripted replacement of a binary nxwish (former xowish). This
 # script can be used as interactive shell for testing or like a