diff --git a/SConstruct b/SConstruct
index 32cb644..650333a 100644
--- a/SConstruct
+++ b/SConstruct
@@ -6,7 +6,7 @@
 # application, then calls the sconscripts for libfluxus and
 # the fluxus Racket modules
 
-import os, os.path, sys, commands, subprocess
+import os, os.path, sys, subprocess
 
 MajorVersion = "0"
 MinorVersion = "19"
@@ -225,13 +225,18 @@ if env['PLATFORM'] == 'posix':
                     ["asound", "alsa/asoundlib.h"],
                     ["openal", "AL/al.h"]]
 
+env.Append(ENV={'PATH': ' ' + os.environ['PATH'], })
+env.Append(LIBPATH=ARGUMENTS.get('LIBPATH', '').split(':'))
+env.Append(CCFLAGS=' ' + os.environ.get('NIX_CFLAGS_COMPILE',''))
+env.Append(CCFLAGS=' -DNULL=0')
+
 ################################################################################
 # Make sure we have these libraries availible
 
 if not GetOption('clean'):
-        print '--------------------------------------------------------'
-        print 'Fluxus: Configuring Build Environment'
-        print '--------------------------------------------------------'
+        print('--------------------------------------------------------')
+        print('Fluxus: Configuring Build Environment')
+        print('--------------------------------------------------------')
         # detect ode precision
         if not GetOption('clean'):
           try:
@@ -240,27 +245,27 @@ if not GetOption('clean'):
             if isinstance(ode_str[0], str):
               env.MergeFlags(ode_str[0])
           except:
-            print 'WARNING: unable to run ode-config, cannot detect ODE precision'
+            print('WARNING: unable to run ode-config, cannot detect ODE precision')
 
         conf = Configure(env)
 
         # check Racket and OpenAL frameworks on osx
         if env['PLATFORM'] == 'darwin':
                 if not conf.CheckHeader('scheme.h'):
-                        print "ERROR: 'racket3m' must be installed!"
+                        print("ERROR: 'racket3m' must be installed!")
                         Exit(1)
                 if racket_framework:
                   LibList = filter(lambda x: x[0] != 'racket3m', LibList)
                 # OpenAL should be installed everywhere
                 if not conf.CheckHeader('OpenAL/al.h'):
-                        print "ERROR: 'OpenAL' must be installed!"
+                        print("ERROR: 'OpenAL' must be installed!")
                         Exit(1)
 
         # all libraries are required, and some of them require each other,
         # hence the order is important, and autoadd=1
         for (lib,headers) in LibList:
                 if not conf.CheckLibWithHeader(lib, headers, 'C', autoadd = 1):
-                        print "ERROR: '%s' must be installed!" % (lib)
+                        print("ERROR: '%s' must be installed!" % (lib))
                         Exit(1)
 
         if not conf.CheckFunc("dInitODE2"):
@@ -334,7 +339,7 @@ if not GetOption('clean'):
 			])
 
 	if raco_status != 0:
-		print "ERROR: Failed to run command 'raco'"
+		print("ERROR: Failed to run command 'raco'")
 		Exit(1)
 
 
@@ -377,8 +382,8 @@ if not GetOption('clean') and static_modules:
 
 		app_env['LIBS'].remove("pthread")
 		app_env['LIBS'].remove("dl")
-                app_env['LIBS'].remove("ode")
-                app_env['LIBS'].remove("sndfile")
+		app_env['LIBS'].remove("ode")
+		app_env['LIBS'].remove("sndfile")
 
 		# now go through the rest of the libs, removing them from
 		# the environment at the same time
@@ -425,7 +430,7 @@ SConscript(dirs = build_dirs,
 if not GetOption('clean'):
     helpmap_status = subprocess.call(["racket", "makehelpmap.scm"], cwd="docs/helpmap")
     if helpmap_status != 0:
-        print "ERROR: Failed to build 'docs/helpmap'"
+        print("ERROR: Failed to build 'docs/helpmap'")
         Exit(1)
 
 ################################################################################