diff --git a/extra/monotonic-clock/authors.txt b/basis/monotonic-clock/authors.txt similarity index 100% rename from extra/monotonic-clock/authors.txt rename to basis/monotonic-clock/authors.txt diff --git a/extra/monotonic-clock/monotonic-clock.factor b/basis/monotonic-clock/monotonic-clock.factor similarity index 100% rename from extra/monotonic-clock/monotonic-clock.factor rename to basis/monotonic-clock/monotonic-clock.factor diff --git a/extra/monotonic-clock/unix/authors.txt b/basis/monotonic-clock/unix/authors.txt similarity index 100% rename from extra/monotonic-clock/unix/authors.txt rename to basis/monotonic-clock/unix/authors.txt diff --git a/extra/monotonic-clock/unix/macosx/authors.txt b/basis/monotonic-clock/unix/macosx/authors.txt similarity index 100% rename from extra/monotonic-clock/unix/macosx/authors.txt rename to basis/monotonic-clock/unix/macosx/authors.txt diff --git a/extra/monotonic-clock/unix/macosx/macosx.factor b/basis/monotonic-clock/unix/macosx/macosx.factor similarity index 100% rename from extra/monotonic-clock/unix/macosx/macosx.factor rename to basis/monotonic-clock/unix/macosx/macosx.factor diff --git a/extra/monotonic-clock/unix/macosx/tags.txt b/basis/monotonic-clock/unix/macosx/tags.txt similarity index 100% rename from extra/monotonic-clock/unix/macosx/tags.txt rename to basis/monotonic-clock/unix/macosx/tags.txt diff --git a/extra/monotonic-clock/unix/unix.factor b/basis/monotonic-clock/unix/unix.factor similarity index 100% rename from extra/monotonic-clock/unix/unix.factor rename to basis/monotonic-clock/unix/unix.factor diff --git a/extra/monotonic-clock/windows/authors.txt b/basis/monotonic-clock/windows/authors.txt similarity index 100% rename from extra/monotonic-clock/windows/authors.txt rename to basis/monotonic-clock/windows/authors.txt diff --git a/extra/monotonic-clock/windows/tags.txt b/basis/monotonic-clock/windows/tags.txt similarity index 100% rename from extra/monotonic-clock/windows/tags.txt rename to basis/monotonic-clock/windows/tags.txt diff --git a/extra/monotonic-clock/windows/windows.factor b/basis/monotonic-clock/windows/windows.factor similarity index 100% rename from extra/monotonic-clock/windows/windows.factor rename to basis/monotonic-clock/windows/windows.factor