Error building Tcl9 on minimalistic Debian

Folks,
I try to build Tcl9 from sources on a minmalistic Debian installation.
At least it has no zip installed. It seems that the build process
then uses minizip which is part of the release.
I saw that minizip is build and used succesfully at least once.
But later on I get this error (german lang/localisation):
---------------------------------------------------------------
<snip>
creating libthread.vfs/thread_library (prepare compression)
creating libthread3.0.0.zip from libthread.vfs/thread_library
cd libthread.vfs && /home/schmitzu/ent/buildt9/toolsBuild/tcl9.0.0/unix/pkgs8/thread3.0.0/minizip -o -r ../libthread3.0.0.zip *
/bin/bash: Zeile 5: /home/schmitzu/ent/buildt9/toolsBuild/tcl9.0.0/unix/pkgs8/thread3.0.0/minizip: Datei oder Verzeichnis nicht gefunden
make[1]: *** [Makefile:233: libthread3.0.0.zip] Fehler 127
make[1]: Verzeichnis »/home/schmitzu/ent/buildt9/toolsBuild/tcl9.0.0/unix/pkgs8/thread3.0.0« wird verlassen
make: *** [Makefile:2070: packages] Fehler 2
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It seems that the thread package uses minizip in the wrong place.
Can anyone confirm this or does anyone know how to patch?
(beside installing zip...)
Many thanks in advance
Uwe