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-3.2.4/Makefile.am
===================================================================
--- smalltalk-3.2.4.orig/Makefile.am	2013-01-04 18:56:47.000000000 +0800
+++ smalltalk-3.2.4/Makefile.am	2013-01-04 18:59:51.715391338 +0800
@@ -30,7 +30,7 @@
 if ENABLE_DISASSEMBLER
 SUBDIRS += opcode
 endif
-SUBDIRS += libgst . $(BUILT_PACKAGES) doc tests
+SUBDIRS += libgst . $(BUILT_PACKAGES) tests
 
 # Running gst inside the build directory...