diff --git a/pre_commit/resources/hook-tmpl b/pre_commit/resources/hook-tmpl
index 78aa2a83..e18812ff 100644
--- a/pre_commit/resources/hook-tmpl
+++ b/pre_commit/resources/hook-tmpl
@@ -38,7 +38,7 @@ if [ -x "$HERE"/{hook_type}.legacy ]; then
     fi
 fi
 
-CONF_FILE=$(git rev-parse --show-toplevel)"/{config_file}"
+CONF_FILE="$(git rev-parse --show-toplevel)/{config_file}"
 if [ ! -f $CONF_FILE  ]; then
     if [ $SKIP_ON_MISSING_CONF = true ] || [ ! -z $PRE_COMMIT_ALLOW_NO_CONFIG ]; then
         echo '`{config_file}` config file not found. Skipping `pre-commit`.'
@@ -56,7 +56,7 @@ fi
 
 # Run pre-commit
 if ((WHICH_RETV == 0)); then
-    pre-commit run $args -c {config_file}
+    pre-commit run $args --config {config_file}
     PRE_COMMIT_RETV=$?
 elif ((ENV_PYTHON_RETV == 0)); then
     "$ENV_PYTHON" -m pre_commit.main $args
diff --git a/tests/commands/install_uninstall_test.py b/tests/commands/install_uninstall_test.py
index 357131c5..80e249be 100644
--- a/tests/commands/install_uninstall_test.py
+++ b/tests/commands/install_uninstall_test.py
@@ -162,6 +162,18 @@ def test_install_pre_commit_and_run(tempdir_factory):
         assert NORMAL_PRE_COMMIT_RUN.match(output)
 
 
+def test_install_pre_commit_and_run_custom_path(tempdir_factory):
+    path = make_consuming_repo(tempdir_factory, 'script_hooks_repo')
+    with cwd(path):
+        cmd_output('git', 'mv', C.CONFIG_FILE, 'custom-config.yaml')
+        cmd_output('git', 'commit', '-m', 'move pre-commit config')
+        assert install(Runner(path, 'custom-config.yaml')) == 0
+
+        ret, output = _get_commit_output(tempdir_factory)
+        assert ret == 0
+        assert NORMAL_PRE_COMMIT_RUN.match(output)
+
+
 def test_install_in_submodule_and_run(tempdir_factory):
     src_path = make_consuming_repo(tempdir_factory, 'script_hooks_repo')
     parent_path = git_dir(tempdir_factory)