Adding Readme.md explanation

sass · Sep 10, 2016 · 3e7f6b4 · 3e7f6b4
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diff --git a/Readme.md b/Readme.md
@@ -41,6 +41,13 @@ and tests there.
 
 We even run Travis tests for SassC!
 
+DEBUG builds
+============
+
+Set the environment variable `DEBUG` to `1` to enable debug builds that can be debugged
+with `gdb`, `lldb` and others. E.g.: use `$ DEBUG=1 ./script/spec` to run the tests with
+a debug build.
+
 Tests
 -------