diff --git a/docs/moving-to-linux.md b/docs/moving-to-linux.md
index ac4ddfa..27d8d6e 100644
--- a/docs/moving-to-linux.md
+++ b/docs/moving-to-linux.md
@@ -29,14 +29,12 @@ about:
   download, or let the build fetch them again; `make ports` calls `curl` and
   verifies each against a known SHA-256, so a re-download is safe either way.
   Without a network connection, copy it.
-- **`sysroot/`** is assembled by the build.
-
-`build/` and `sysroot/` are ignored and do not need copying — `make` rebuilds
-them. **One exception**: `sysroot/bin/` holds musl, toybox and mksh, which
-cannot be built on Windows and so were staged there once. On Linux they *can*
-be built, so let the build produce them (`make ports`) rather than carrying
-stale binaries across. The staged copies predate the SchOS rename anyway —
-`sysroot/bin/sh` still contains the symbol `__schunix_tp`.
+- **`sysroot/`** is assembled by the build, so it does not need copying — and
+  on this machine it should not be. Its `bin/` holds musl, toybox and mksh,
+  staged once because Windows cannot build them. Linux can, so let `make ports`
+  produce them rather than carrying stale binaries across: the staged copies
+  predate the rename, and `sysroot/bin/sh` still contains `__schunix_tp`.
+- **`build/`** is pure output. Delete it and forget it.
 
 ## 2. Restore the memory