From 2a40712346a231d6d9f5f520ac7abadbc19b7124 Mon Sep 17 00:00:00 2001
From: Squibid <me@zacharyscheiman.com>
Date: Sat, 6 Dec 2025 16:05:53 -0500
Subject: [PATCH] don't try to access result of nix store if it's not available

---
 src/NixStore.zig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/NixStore.zig b/src/NixStore.zig
index 0fd66b9..b7db990 100644
--- a/src/NixStore.zig
+++ b/src/NixStore.zig
@@ -14,6 +14,8 @@ pub fn add(path: []const u8) error{Failure}![]const u8 {
         .argv = &[_][]const u8{ "nix", "store", "add", path },
     }) catch return error.Failure;
 
+    if (res.term != .Exited or res.term.Exited != 0) return error.Failure;
+    if (res.stdout.len == 0) return error.Failure;
     return res.stdout[0 .. res.stdout.len - 1]; // to chop off the \n
 }