From cc77a232a1e26eeb317f07a8f4113a75a50335ed Mon Sep 17 00:00:00 2001
From: Martin von Zweigbergk <martinvonz@google.com>
Date: Mon, 29 Aug 2022 14:09:08 -0700
Subject: [PATCH] readme: explain that Rust >= 1.60 is needed

We have `rust-version = "1.60"` in `Cargo.toml`, but Cargo doesn't
check that until after dependency resolution, which fails if you have
an older version (I don't know why).
---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index 4f09f77ac..da2ac85c8 100644
--- a/README.md
+++ b/README.md
@@ -145,6 +145,13 @@ See below for how to build from source. There are also
 [pre-built binaries](https://github.com/martinvonz/jj/releases) for Windows,
 Mac, or Linux (musl).
 
+If you're installing from source, you need to use Rust version 1.60 or higher,
+or you will get a cryptic message like this:
+```
+error: failed to select a version for the requirement `libgit2-sys = "=0.14.0"``
+candidate versions found which didn't match: 0.13.2+1.4.2, 0.13.1+1.4.2, 0.13.0+1.4.1, ...
+```
+
 ### Linux
 
 On most distributions, you'll need to build from source using `cargo` directly.