diff --git a/scripts/bootstrap.sh b/scripts/bootstrap.sh
index 68f26c4..792707f 100644
--- a/scripts/bootstrap.sh
+++ b/scripts/bootstrap.sh
@@ -474,31 +474,31 @@ set -e
 
 # REPO is injected at install time; try to resolve canonical project root using
 # git when available to avoid mistakenly selecting parent directories.
+# Try to locate the repo root dynamically. Use the embedded __REPO__ value as a hint,
+# but prefer to discover a repo from the current working directory or git.
 REPO="__REPO__"
-if command -v git >/dev/null 2>&1; then
-  gitroot=$(git -C "$REPO" rev-parse --show-toplevel 2>/dev/null || true)
-  if [ -n "$gitroot" ]; then
-    REPO="$gitroot"
-  else
-    # Try resolving from the current working directory
+# If the placeholder does not appear to point at a repo, attempt discovery.
+if [ ! -f "$REPO/CLI.py" ] && [ ! -f "$REPO/pyproject.toml" ]; then
+  # First try to find a git toplevel from the current working directory.
+  if command -v git >/dev/null 2>&1; then
     gitroot=$(git -C "$(pwd -P)" rev-parse --show-toplevel 2>/dev/null || true)
     if [ -n "$gitroot" ]; then
       REPO="$gitroot"
     fi
   fi
-else
-  # Fallback: walk up from CWD to find CLI.py or pyproject.toml
-  if [ ! -f "$REPO/CLI.py" ] && [ ! -f "$REPO/pyproject.toml" ]; then
-    CUR="$(pwd -P)"
-    while [ "$CUR" != "/" ] && [ "$CUR" != "" ]; do
-      if [ -f "$CUR/CLI.py" ] || [ -f "$CUR/pyproject.toml" ]; then
-        REPO="$CUR"
-        break
-      fi
-      CUR="$(dirname "$CUR")"
-    done
-  fi
 fi
+# If still unresolved, walk up from the CWD looking for signs of the project.
+if [ ! -f "$REPO/CLI.py" ] && [ ! -f "$REPO/pyproject.toml" ]; then
+  CUR="$(pwd -P)"
+  while [ "$CUR" != "/" ] && [ "$CUR" != "" ]; do
+    if [ -f "$CUR/CLI.py" ] || [ -f "$CUR/pyproject.toml" ]; then
+      REPO="$CUR"
+      break
+    fi
+    CUR="$(dirname "$CUR")"
+  done
+fi
+# At this point REPO may still be wrong if mm was invoked outside any project; keep the embedded path as a last resort.
 
 VENV="$REPO/.venv"
 
@@ -565,10 +565,30 @@ exit 127
 MM
 
 # Inject absolute repo path into the installed script so global launcher prefers the project venv
-escaped_repo=$(printf '%s' "$REPO" | sed -e 's/[\/&]/\\&/g')
-sed -i "s|__REPO__|$escaped_repo|g" "$USER_BIN/mm" || true
+# Replace __REPO__ placeholder robustly using Python (preferred) else fallback to sed
+if command -v python >/dev/null 2>&1; then
+  python - <<PY "$USER_BIN/mm" "$REPO"
+import sys
+fn=sys.argv[1]; repo=sys.argv[2]
+with open(fn,'r', encoding='utf-8') as f:
+    s = f.read()
+s = s.replace('__REPO__', repo)
+with open(fn,'w', encoding='utf-8') as f:
+    f.write(s)
+PY
+else
+  escaped_repo=$(printf '%s' "$REPO" | sed -e 's/[\/&]/\\&/g')
+  sed -i "s|__REPO__|$escaped_repo|g" "$USER_BIN/mm" || true
+fi
 chmod +x "$USER_BIN/mm"
 
+# Verify injection succeeded
+if grep -Fq "$REPO" "$USER_BIN/mm"; then
+  echo "Installed global 'mm' launcher with REPO=$REPO"
+else
+  echo "ERROR: failed to inject repository path into $USER_BIN/mm; inspect file: $USER_BIN/mm" >&2
+fi
+
 # Quick verification of the global launcher; helps catch packaging issues early.
 if "$USER_BIN/mm" --help >/dev/null 2>&1; then
   echo "Global 'mm' launcher verified: $USER_BIN/mm runs correctly."