diff --git a/LUCI.md b/LUCI.md
index 1c8da144..4d6181c1 100644
--- a/LUCI.md
+++ b/LUCI.md
@@ -27,3 +27,7 @@ Every TryBot run includes a default set of the most common builders.
 Builders that fail with "infra failed" have a purple chip rather than green (passed) or red (tests failed). These failures indicate some kind of failure in the CI infrastructure itself. They are unlikely to be due to something in your CL.
 
 If you encounter such errors, you can reach out to [golang-dev](https://groups.google.com/g/golang-dev) for help investigating them. You may also try rerunning the build, which may succeed on a subsequent run depending on the cause of the infra failure.
+
+## build details
+
+The "Steps & Logs" section on a LUCI build page enumerates steps that were executed. Each step can be expanded to get to its logs, environment variables, and command line arguments. The "get go" step includes the output of `go env` from the Go toolchain used in the build.
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