diff --git a/install-scripts/uninstall-safe-chain.sh b/install-scripts/uninstall-safe-chain.sh
index abe235f..d215405 100755
--- a/install-scripts/uninstall-safe-chain.sh
+++ b/install-scripts/uninstall-safe-chain.sh
@@ -93,13 +93,13 @@ derive_install_dir_from_binary() {
 # Determines the installed safe-chain base directory for uninstall.
 # Prefers the binary-reported location, then infers it from PATH, then falls back to ~/.safe-chain.
 get_install_dir() {
-    reported_install_dir=$(get_reported_install_dir)
+    reported_install_dir=$(get_reported_install_dir || true)
     if [ -n "$reported_install_dir" ]; then
         printf '%s\n' "$reported_install_dir"
         return 0
     fi
 
-    command_path=$(get_safe_chain_command_path)
+    command_path=$(get_safe_chain_command_path || true)
     install_dir=$(derive_install_dir_from_binary "$command_path" || true)
     if [ -n "$install_dir" ]; then
         printf '%s\n' "$install_dir"
diff --git a/packages/safe-chain/src/config/safeChainDir.js b/packages/safe-chain/src/config/safeChainDir.js
index 6762d0b..4d4f013 100644
--- a/packages/safe-chain/src/config/safeChainDir.js
+++ b/packages/safe-chain/src/config/safeChainDir.js
@@ -39,19 +39,33 @@ export function getCertsDir() {
 }
 
 /**
- * @param {string} moduleUrl
+ * Resolves the directory of the calling module.
+ * Falls back to __dirname when import.meta.url is unavailable (pkg CJS binary).
+ * @param {string | undefined} moduleUrl
+ * @returns {string}
+ */
+function resolveModuleDir(moduleUrl) {
+  if (moduleUrl) {
+    return path.dirname(fileURLToPath(moduleUrl));
+  }
+  // eslint-disable-next-line no-undef
+  return __dirname;
+}
+
+/**
+ * @param {string | undefined} moduleUrl
  * @param {string} fileName
  * @returns {string}
  */
 export function getStartupScriptSourcePath(moduleUrl, fileName) {
-  return path.join(path.dirname(fileURLToPath(moduleUrl)), "startup-scripts", fileName);
+  return path.join(resolveModuleDir(moduleUrl), "startup-scripts", fileName);
 }
 
 /**
- * @param {string} moduleUrl
+ * @param {string | undefined} moduleUrl
  * @param {string} fileName
  * @returns {string}
  */
 export function getPathWrapperTemplatePath(moduleUrl, fileName) {
-  return path.join(path.dirname(fileURLToPath(moduleUrl)), "path-wrappers", "templates", fileName);
+  return path.join(resolveModuleDir(moduleUrl), "path-wrappers", "templates", fileName);
 }