diff --git a/README.md b/README.md
index 4752e8a6b6..e404874811 100644
--- a/README.md
+++ b/README.md
@@ -1,45 +1,4 @@
-### boulder
+# boulder-d-legacy
 
-This repository contains the `boulder` tool, which is used to produce
-`.stone` binary packages from a `stone.yml` source definition file.
-
-#### Prerequisites
-
-`boulder` (and its own dependencies) depends on a couple of system libraries
-and development headers, including (in fedora package names format):
-
-- `cmake`, `meson` and `ninja`
-- `libcurl` and `libcurl-devel`
-- `libzstd` and `libzstd-devel`
-- `xxhash-libs` and `xxhash-devel`
-- `moss` (build prior to building `boulder`)
-- `moss-container` (build after `moss` and prior to boulding `boulder`)
-
-### Cloning
-
-Remember to add the `--recurse-submodule` argument (for serpent-style commit hook, `update-format.sh` and editorconfig settings).
-
-### Building
-
-    meson --prefix=/usr build/
-    meson compile -C build/
-    sudo ninja install -C build/
-
-### Running
-
-    sudo boulder build stone.yml
-
-### Bumping the version showed in `boulder version`
-
-Edit the `meson.build` project `version` property:
-
-    project(
-        'boulder',
-        ['d'],
-        version: '1.0.1', # <- this
-        license: [
-                'Zlib',
-        ]
-    )
-
-This will in turn get picked up by `source/boulder/environment.d`
+This has been superceded by the Rust implementation.
+It exists for historical purposes.