As it turns out, scons doesn't inherit environment variables by
default. Debugging this was very pleasant. -- oxij

diff --git a/SConstruct b/SConstruct
index 5c1e774..66aa4c8 100644
--- a/SConstruct
+++ b/SConstruct
@@ -5,13 +5,11 @@ tools = ['default']
 if os.name == 'nt':
 	tools = ['mingw']
 
-env = Environment(tools = tools)
+env = Environment(tools = tools, ENV = os.environ)
 
 options_file = None
-if sys.platform == 'linux2':
-	options_file = "linux"
 
-elif 'msvc' in env['TOOLS']:
+if 'msvc' in env['TOOLS']:
 	options_file = "msvc"
 else:
 	options_file = "posix"
diff --git a/config_posix.py b/config_posix.py
index 2bb696c..eb4eb9b 100644
--- a/config_posix.py
+++ b/config_posix.py
@@ -16,7 +16,7 @@ CCFLAGS = ['-O2', '-ansi', '-Wall']
 prefix = '/usr/local'
 
 # libraries
-LIBS = ['lua', 'lualib', 'm']
+LIBS = ['lua', 'liblua', 'm']