From f6c13a20c3567d707d8823279e3b197d7f3e8e47 Mon Sep 17 00:00:00 2001
From: Zhaofeng Li <hello@zhaofeng.li>
Date: Sat, 29 Oct 2022 02:24:55 -0600
Subject: [PATCH] eval: Use correct value parser for expression_file

Fallout from Clap 4.0 migration.
---
 src/command/eval.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/command/eval.rs b/src/command/eval.rs
index 07efb9e..32156cb 100644
--- a/src/command/eval.rs
+++ b/src/command/eval.rs
@@ -1,6 +1,6 @@
 use std::path::PathBuf;
 
-use clap::{Arg, ArgMatches, Command as ClapCommand};
+use clap::{Arg, ArgMatches, Command as ClapCommand, value_parser};
 
 use crate::error::ColmenaError;
 use crate::util;
@@ -28,7 +28,8 @@ For example, to retrieve the configuration of one node, you may write something
             .index(1)
             .value_name("FILE")
             .help("The .nix file containing the expression")
-            .num_args(1))
+            .num_args(1)
+            .value_parser(value_parser!(PathBuf)))
         .arg(Arg::new("expression")
             .short('E')
             .value_name("EXPRESSION")