Index: kitsh/buildsrc/kitsh-0.0/kitInit.c
==================================================================
--- kitsh/buildsrc/kitsh-0.0/kitInit.c
+++ kitsh/buildsrc/kitsh-0.0/kitInit.c
@@ -207,11 +207,11 @@
 	"set ::TCLKIT_TYPE \"kitdll\"\n"
 #else
 	"set ::TCLKIT_TYPE \"tclkit\"\n"
 #endif /* TCLKIT_DLL */
 	"set ::TCLKIT_MOUNTPOINT " TCLKIT_MOUNTPOINT "\n"
-	"set ::TCLKIT_VFSSOURCE " TCLKIT_VFSSOURCE "\n"
+	"catch { set ::TCLKIT_VFSSOURCE " TCLKIT_VFSSOURCE " }\n"
 	"set ::TCLKIT_MOUNTPOINT_VAR {" TCLKIT_MOUNTPOINT "}\n"
 	"set ::TCLKIT_VFSSOURCE_VAR {" TCLKIT_VFSSOURCE "}\n"
 	"uplevel #0 $s\n"
 #if defined(KIT_INCLUDES_TK) && defined(KIT_TK_VERSION)
 	"package ifneeded Tk " KIT_TK_VERSION " {\n"