diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6727bd9..8619205 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -96,12 +96,12 @@ jobs:
       # the fetched 10.9 SDK. Building against the runner's own SDK with only
       # -mmacosx-version-min=10.9 would accept declarations 10.9 never had.
       - name: Configure (cross, against the pinned 10.9 SDK)
-        run: cmake --preset cross
+        run: shipyard-cmake --preset cross
 
       # Every tool is gated POST_BUILD by shipyard's compat guard: fails if a
       # binary declares a floor above 10.9 or imports a symbol 10.9 lacks.
       - name: Build + compat guard
-        run: cmake --build --preset cross
+        run: shipyard-cmake --build --preset cross
 
       # The shared runner takes the whole suite, so a newly added test runs the
       # day it lands rather than when someone remembers a CI line. Includes
diff --git a/README.md b/README.md
index 74a2ff7..46ab7a7 100644
--- a/README.md
+++ b/README.md
@@ -45,23 +45,22 @@ no dependencies, and edits binaries produced by toolchains fifteen years newer.
 ## Building
 
 ```sh
-cmake -S . -B build && cmake --build build && ctest --test-dir build
+shipyard-cmake -S . -B build && shipyard-cmake --build build && shipyard-ctest --test-dir build
 ```
 
 Needs [shipyard](https://github.com/ModernMavericks/shipyard), the family's
-shared CMake helpers — install it once and it self-registers, so `find_package`
-finds it with no `CMAKE_PREFIX_PATH`:
-
-```sh
-cmake -S ../mavericks-shipyard -B /tmp/sy -DCMAKE_INSTALL_PREFIX="$HOME/.local"
-cmake --install /tmp/sy
-```
+shared CMake helpers. Install its pkg once; among other things it puts
+`shipyard-cmake`, `shipyard-ctest` and `shipyard-cpack` in `/usr/local/bin`.
+**`shipyard-cmake` is the only cmake that configures this repo** — it supplies
+the prefix `find_package(MavericksShipyard)` resolves from, and
+`MavericksShipyardConfig.cmake` refuses any other cmake. Use `shipyard-ctest`
+and `shipyard-cpack` for the same reason: same rule, same commands.
 
 Presets pick the build mode:
 
 ```sh
-cmake --preset native   # on 10.9, with its own clang
-cmake --preset cross    # on a modern host, against the pinned 10.9 SDK
+shipyard-cmake --preset native   # on 10.9, with its own clang
+shipyard-cmake --preset cross    # on a modern host, against the pinned 10.9 SDK
 ```
 
 Every tool is gated by shipyard's compat guard, which fails the build if a
diff --git a/build/msc.sh b/build/msc.sh
index 9e7d20a..43c2af0 100644
--- a/build/msc.sh
+++ b/build/msc.sh
@@ -1,9 +1,25 @@
-# build/msc.sh -- sourced: locate the installed mavericks-shipyard scripts dir as $SHIPYARD.
-# Resolution: $SHIPYARD_SCRIPTS (exported by install@v1 in CI) -> the CMake user package registry (a local
-# `cmake --install`) -> a sibling checkout (a dev box that has never installed it).
-# This is the only per-repo part of the version scaffolding; the logic itself lives in shipyard.
+#   usage: . build/msc.sh
+#          Sourced by a ModernMavericks product's build scripts: locates shipyard's scripts as
+#          $SHIPYARD and exports SHIPYARD_SCRIPTS. In CI, install@v1 has already exported
+#          SHIPYARD_SCRIPTS; anywhere else this asks shipyard-cmake -- the only cmake that configures
+#          against shipyard -- where find_package(MavericksShipyard) lands, so a CMAKE_PREFIX_PATH
+#          dev override moves the scripts together with the modules. About 2 s, exported so children
+#          skip it. CANONICAL COPY: shipyard's scripts/templates/msc.sh; conventions check 17
+#          requires every product's copy to match it byte for byte, so change it there, not here.
 SHIPYARD="${SHIPYARD_SCRIPTS:-}"
-[ -d "$SHIPYARD" ] || SHIPYARD="$(cat "$HOME/.cmake/packages/MavericksShipyard/"* 2>/dev/null | head -1)/scripts"
-[ -d "$SHIPYARD" ] || SHIPYARD="$(cd "$(dirname "$0")/.." && pwd)/../mavericks-shipyard/scripts"
-[ -d "$SHIPYARD" ] || { echo "cannot locate mavericks-shipyard scripts (install it, or set SHIPYARD_SCRIPTS)" >&2; return 1 2>/dev/null || exit 1; }
-export SHIPYARD
+if [ ! -d "$SHIPYARD" ]; then
+  _msc_probe="$(mktemp -d "${TMPDIR:-/tmp}/shipyard-probe.XXXXXX")"
+  printf '%s\n' 'cmake_minimum_required(VERSION 3.16)' 'project(shipyard_probe NONE)' \
+    'find_package(MavericksShipyard REQUIRED)' 'message(STATUS "SHIPYARD_DIR=${MavericksShipyard_DIR}")' \
+    > "$_msc_probe/CMakeLists.txt"
+  # platform: appending /scripts to the substitution directly made a failed probe (no
+  #           shipyard-cmake, a refused configure) yield the literal "/scripts" -- an absolute path,
+  #           plausible-looking, and the error below would then complain about the wrong thing. So
+  #           assign the probe's answer first and append only if there was one.
+  _msc_dir="$(shipyard-cmake -S "$_msc_probe" -B "$_msc_probe/b" 2>/dev/null | sed -n 's/^-- SHIPYARD_DIR=//p')"
+  if [ -n "$_msc_dir" ]; then SHIPYARD="$_msc_dir/scripts"; fi
+  rm -rf "$_msc_probe"; unset _msc_probe _msc_dir
+fi
+[ -d "$SHIPYARD" ] || { echo "msc.sh: cannot locate shipyard -- install the shipyard pkg (it provides shipyard-cmake), or set SHIPYARD_SCRIPTS" >&2; return 1 2>/dev/null || exit 1; }
+SHIPYARD_SCRIPTS="$SHIPYARD"
+export SHIPYARD SHIPYARD_SCRIPTS
diff --git a/tests/README.md b/tests/README.md
index 5b0cdd4..ec02294 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -277,7 +277,7 @@ reproducing the failure in new shapes:
   force the rebuild and confirm it actually happened — compile the test
   directly with `cc` (as this repo's hermetic tests' own header comments
   already suggest, e.g. `trie_test.c`'s), or `touch` the source and use
-  `cmake --build --clean-first`, or otherwise check the object's mtime
+  `shipyard-cmake --build --clean-first`, or otherwise check the object's mtime
   genuinely advanced past the edit. Never trust a mutation result from a
   build you did not affirmatively force.
 
diff --git a/tests/compat-sweep.sh b/tests/compat-sweep.sh
index d19bb30..2dc5998 100755
--- a/tests/compat-sweep.sh
+++ b/tests/compat-sweep.sh
@@ -30,7 +30,7 @@
 # families of binaries built, it takes minutes, and Task 2 removes half of what
 # it drives. Run it by hand, on real 10.9, when the translation changes:
 #
-#   cmake --preset native-local && cmake --build --preset native-local
+#   shipyard-cmake --preset native-local && shipyard-cmake --build --preset native-local
 #   MACHO_SWEEP_NEW_BIN=/private/tmp/mm-build/schmonz/macho-tools/native \
 #       sh tests/compat-sweep.sh /path/to/a/build-of-91b30b3
 #
diff --git a/tests/differential.sh b/tests/differential.sh
index 5bec9a0..23b9534 100755
--- a/tests/differential.sh
+++ b/tests/differential.sh
@@ -17,10 +17,10 @@
 # a rewrite is reached and want to show the rewrite itself did not move:
 #
 #   git stash                                  # or: git worktree add of the ref
-#   cmake -S . -B /tmp/ref -DMAVERICKS_EXPECTED_MODE=native
-#   cmake --build /tmp/ref
+#   shipyard-cmake -S . -B /tmp/ref -DMAVERICKS_EXPECTED_MODE=native
+#   shipyard-cmake --build /tmp/ref
 #   git stash pop
-#   cmake --preset native-local && cmake --build --preset native-local
+#   shipyard-cmake --preset native-local && shipyard-cmake --build --preset native-local
 #   sh tests/differential.sh /tmp/ref <native-local bindir>
 #
 # WHAT IT SWEEPS. There are ~86,000 regular files under the default roots on a