diff --git a/Docs/src/build.but b/Docs/src/build.but
index 07583568..faa0287e 100644
--- a/Docs/src/build.but
+++ b/Docs/src/build.but
@@ -6,7 +6,7 @@ NSIS version 2.07 introduced a new build system, based on \W{http://www.scons.or
 
 Source code is available in \W{http://cvs.sourceforge.net/viewcvs.py/nsis}{CVS} and as a separate package with every \W{http://sourceforge.net/project/showfiles.php?group_id=22049}{NSIS distribution}.
 
-To build NSIS \W{http://www.python.org/}{Python} and \W{http://www.scons.org/}{SCons} must be installed. Currently, the supported version of SCons is version 0.96.90. Any version of Python above 1.5.2 is supported.
+To build NSIS \W{http://www.python.org/}{Python} and \W{http://www.scons.org/}{SCons} must be installed. Currently, the supported version of SCons is version 0.96.91. Any version of Python above 1.6 is supported.
 
 To build, open a console, change the working directory to the root directory of NSIS and type \c{scons}. That's it. For example:
 
diff --git a/SConstruct b/SConstruct
index 0c6d8450..9d7353ac 100644
--- a/SConstruct
+++ b/SConstruct
@@ -8,7 +8,7 @@
 ##
 
 EnsurePythonVersion(1,6)
-# no revision check yet - EnsureSConsVersion(0,96,90)
+EnsureSConsVersion(0,96,91)
 
 stubs = [
 	'bzip2',
@@ -51,7 +51,6 @@ misc = [
 ]
 
 defenv = Environment()
-defenv.SConsignFile()
 Export('defenv')
 
 ######################################################################