diff --git a/maintainers/docs/cross.txt b/maintainers/docs/cross.txt
index 7fce2385707c..c79c571dee97 100644
--- a/maintainers/docs/cross.txt
+++ b/maintainers/docs/cross.txt
@@ -165,6 +165,11 @@ stdenv.mkDerivation {
 }
 ---
 
+The builder.sh for a cross-compiler. Note that the binutils are prefixed
+with the architecture name, so arm-linux-ld instead of ld, etc. This is
+necessary because when we cross-compile a lot of programs look for these
+tools with these specific names. The standard gcc-wrapper does not take this
+into account yet.
 
 ---
 source $stdenv/setup