diff --git a/scripts/docker-iter-build.sh b/scripts/docker-iter-build.sh
index 481ed4a42e..af1665c9c3 100755
--- a/scripts/docker-iter-build.sh
+++ b/scripts/docker-iter-build.sh
@@ -13,7 +13,7 @@
 #   IMAGE=orcacad-deps scripts/docker-iter-build.sh
 #
 # On success the binary is inside the persistent volume at
-# /OrcaSlicer/build/package/bin/snapmaker-orca (copy it out with a follow-up
+# /OrcaSlicer/build/package/bin/orca-slicer (copy it out with a follow-up
 # `docker run --rm -v orcacad_buildcache:/b alpine cp ...` or via this script's tail).
 set -euo pipefail
 
@@ -29,16 +29,28 @@ echo "REPO=$REPO  IMAGE=$IMAGE  BUILD_VOL=$BUILD_VOL"
 # they carry the build-time gates (e.g. SLIC3R_CAD -> add_definitions(-DSLIC3R_CAD)) that the
 # mounted headers are compiled against. With a stale baked copy the gate silently stays off and
 # the build fails with "class GLCanvas3D has no member named set_design_sketch_tool".
+#
+# build_linux.sh must be mounted for the same reason, and here the stale copy is guaranteed
+# wrong rather than merely risky: orcacad-deps is layered on snaporca-deps, so the baked script
+# is the OTHER fork's and builds `--target Snapmaker_Orca`. This fork's target is `OrcaSlicer`,
+# so without this mount configure succeeds and then ninja dies on "unknown target".
+# scripts/ likewise: build_linux.sh's packaging step sources scripts/appimage_lib_policy.sh,
+# which the baked snaporca tree does not have, so a fully successful link still exited
+# non-zero with "missing AppImage helper" and the binary check never ran.
 docker run --rm \
   -v "$REPO/src":/OrcaSlicer/src \
   -v "$REPO/resources":/OrcaSlicer/resources \
   -v "$REPO/CMakeLists.txt":/OrcaSlicer/CMakeLists.txt \
   -v "$REPO/cmake":/OrcaSlicer/cmake \
   -v "$REPO/deps_src":/OrcaSlicer/deps_src \
+  -v "$REPO/build_linux.sh":/OrcaSlicer/build_linux.sh \
+  -v "$REPO/scripts":/OrcaSlicer/scripts \
   -v "$BUILD_VOL":/OrcaSlicer/build \
   "$IMAGE" \
   bash -lc 'cd /OrcaSlicer && ./build_linux.sh -sr'
 
+# src/CMakeLists.txt:151 renames the OrcaSlicer target's output to "orca-slicer" — not
+# "snapmaker-orca", which is the other fork's binary name.
 echo "=== build finished; checking for binary ==="
 docker run --rm -v "$BUILD_VOL":/b "$IMAGE" \
-  bash -lc 'ls -lh /b/package/bin/snapmaker-orca 2>/dev/null && file /b/package/bin/snapmaker-orca || echo "NO BINARY"'
+  bash -lc 'ls -lh /b/package/bin/orca-slicer 2>/dev/null && file /b/package/bin/orca-slicer || echo "NO BINARY"'