diff -Naur teeworlds-0.5.1-src.orig/default.bam teeworlds-0.5.1-src/default.bam
--- teeworlds-0.5.1-src.orig/default.bam	2009-01-25 14:50:33.000000000 +0100
+++ teeworlds-0.5.1-src/default.bam	2009-03-09 12:14:32.000000000 +0100
@@ -106,6 +106,9 @@
 function build(settings)
 	--settings.objdir = Path("objs")
 	settings.cc.Output = Intermediate_Output
+	settings.cc.flags:Add(os.getenv ('CFLAGS'))
+	settings.cc.flags:Add(os.getenv ('CPPFLAGS'))
+	settings.cc.flags:Add(os.getenv ('LDFLAGS'))
 
 	if config.compiler.value == "cl" then
 		settings.cc.flags:Add("/wd4244")