The build system tries to execute the gst-tool gst-doc and gst-tool is
not installed and the easiest right now is to not build the docs

Index: smalltalk-3.2.91/Makefile.am
===================================================================
--- smalltalk-3.2.91.orig/Makefile.am	2013-04-28 16:07:14.018325529 +0200
+++ smalltalk-3.2.91/Makefile.am	2013-04-28 16:08:10.426335670 +0200
@@ -23,7 +23,7 @@
 gstdatadir=$(pkgdatadir)
 
 DIST_SUBDIRS = lib-src snprintfv lightning libgst \
-	. $(ALL_PACKAGES) tests doc
+	. $(ALL_PACKAGES) tests
 
 SUBDIRS = lib-src lightning $(subdirs)
 SUBDIRS += libgst . $(BUILT_PACKAGES) doc tests