diff --git a/utils/pgsql2sqlite/SConscript b/utils/pgsql2sqlite/SConscript
index 69e829c04..6bb44ef41 100644
--- a/utils/pgsql2sqlite/SConscript
+++ b/utils/pgsql2sqlite/SConscript
@@ -19,6 +19,8 @@
 #
 # $Id$
 
+from copy import copy
+
 Import ('env')
 
 prefix = env['PREFIX']
@@ -36,7 +38,7 @@ source = Split(
 headers = ['#plugins/input/postgis'] + env['CPPPATH'] 
 
 
-libraries =  env['LIBMAPNIK_LIBS']
+libraries =  copy(env['LIBMAPNIK_LIBS'])
 boost_program_options = 'boost_program_options%s' % env['BOOST_APPEND']
 libraries.extend([boost_program_options,'sqlite3','pq','mapnik2'])
 
diff --git a/utils/svg2png/SConscript b/utils/svg2png/SConscript
index 26a1a0fee..72f033355 100644
--- a/utils/svg2png/SConscript
+++ b/utils/svg2png/SConscript
@@ -20,6 +20,7 @@
 # $Id$
 
 import glob
+from copy import copy
 
 Import ('env')
 
@@ -36,7 +37,7 @@ source = Split(
 
 headers = env['CPPPATH'] 
 
-libraries =  env['LIBMAPNIK_LIBS']
+libraries =  copy(env['LIBMAPNIK_LIBS'])
 boost_program_options = 'boost_program_options%s' % env['BOOST_APPEND']
 libraries.extend([boost_program_options,'mapnik2'])