Update rscons

Rsconscript

@@ -6,17 +6,15 @@ configure do
   check_program "convert"
 end
 
-build do
-  main_env = Rscons::Environment.new do |env|
-    env["sources"] = glob("src/**/*.{c,d}", "libs/Derelict*/**/*.d")
-    env["CCFLAGS"] += %w[-Wall]
-    env["D_IMPORT_PATH"] += glob("src/**", "libs/Derelict*/source")
-    env["DFLAGS"] += %w[-Wall]
-    env["LIBS"] += %w[X11 GLX]
-    env.Program("jes", "${sources}")
-  end
-  main_env.clone do |env|
-    env["DFLAGS"] += %w[-g -funittest]
-    env.Program("jestest", "${sources}")
-  end
+main_env = env do |env|
+  env["sources"] = glob("src/**/*.{c,d}", "libs/Derelict*/**/*.d")
+  env["CCFLAGS"] += %w[-Wall]
+  env["D_IMPORT_PATH"] += glob("src", "libs/Derelict*/source")
+  env["DFLAGS"] += %w[-Wall]
+  env["LIBS"] += %w[X11 GLX]
+  env.Program("jes", "${sources}")
+end
+main_env.clone do |env|
+  env["DFLAGS"] += %w[-g -funittest]
+  env.Program("jestest", "${sources}")
 end