From c23501a3b24d84376086179756fefd399c2a7cbb Mon Sep 17 00:00:00 2001
From: "lincoln auster [they/them]" <lincolnauster@gmail.com>
Date: Sun, 6 Feb 2022 16:28:21 -0700
Subject: [PATCH] repl/load-flake: throw error if path isn't specified

---
 src/nix/repl.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/nix/repl.cc b/src/nix/repl.cc
index e9bebff17..97ca39145 100644
--- a/src/nix/repl.cc
+++ b/src/nix/repl.cc
@@ -623,6 +623,9 @@ void NixRepl::loadFile(const Path & path)
 
 void NixRepl::loadFlake(const std::string & flakeRefS)
 {
+    if (flakeRefS.empty())
+        throw Error("cannot use `:load-flake` without a path specified. (Use . for the current working directory.)");
+
     auto flakeRef = parseFlakeRef(flakeRefS, absPath("."), true);
     if (evalSettings.pureEval && !flakeRef.input.isImmutable())
         throw Error("cannot use ':load-flake' on mutable flake reference '%s' (use --impure to override)", flakeRefS);