diff --git a/src/building/how-to-build-and-run.md b/src/building/how-to-build-and-run.md
index d9d5425de..9e7470cc0 100644
--- a/src/building/how-to-build-and-run.md
+++ b/src/building/how-to-build-and-run.md
@@ -292,15 +292,6 @@ everything up then you only need to run one command!
 `rm -rf build` works too, but then you have to rebuild LLVM, which can take
 a long time even on fast computers.
 
-## Build tools
-
-We've actually got quite a few tools that we use in the compiler's build system
-and for testing. To organize these, each tool is a project in `src/tools` with a
-corresponding `Cargo.toml`. All tools are compiled with Cargo (currently having
-independent `Cargo.lock` files) and do not currently explicitly depend on the
-compiler or standard library. Compiling each tool is sequenced after the
-appropriate libstd/libtest/librustc compile above.
-
 ## Extending rustbuild
 
 So, you'd like to add a feature to the rustbuild build system or just fix a bug.