$ ./pre-inst-env guix refresh -l cxxopts
No dependents other than itself: cxxopts@3.0.0

From 7a4c306ffe23151f72a04d1025c8d74490188d0d Mon Sep 17 00:00:00 2001
From: Greg Hogan <code@greghogan.com>
Date: Tue, 12 Apr 2022 19:39:08 +0000
Subject: [PATCH] gnu: cxxopts: Update to 3.0.0.

* gnu/packages/cpp.scm (cxxopts): Update to 3.0.0.
---
 gnu/packages/cpp.scm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/cpp.scm b/gnu/packages/cpp.scm
index ed2d957bed..4e6bc2e22e 100644
--- a/gnu/packages/cpp.scm
+++ b/gnu/packages/cpp.scm
@@ -1064,7 +1064,7 @@ (define-public pegtl
 (define-public cxxopts
   (package
     (name "cxxopts")
-    (version "2.2.1")
+    (version "3.0.0")
     (source (origin
               (method git-fetch)
               (uri (git-reference
@@ -1073,7 +1073,7 @@ (define-public cxxopts
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "0d3y747lsh1wkalc39nxd088rbypxigm991lk3j91zpn56whrpha"))))
+                "08x7j168l1xwj0r3rv89cgghmfhsx98lpq35r3vkh504m1pd55a6"))))
     (build-system cmake-build-system)
     (synopsis "Lightweight C++ command line option parser")
     (description
-- 
2.35.1