This cherry-picked patch fixes tests for Go >= 1.15. Restic v0.10 (which
includes this patch) requires go module support from the Go build system.
Original patch follows.

---
From 97950ab81a18de06b95384da6d8646fef87c9d97 Mon Sep 17 00:00:00 2001
From: Alexander Neumann <alexander@bumpern.de>
Date: Sat, 12 Sep 2020 17:36:44 +0200
Subject: [PATCH] options: Fix test for Go >= 1.15

---
 internal/options/options_test.go | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/internal/options/options_test.go b/internal/options/options_test.go
index de94fc90a1..8d268992a3 100644
--- a/internal/options/options_test.go
+++ b/internal/options/options_test.go
@@ -3,6 +3,7 @@ package options
 import (
 	"fmt"
 	"reflect"
+	"regexp"
 	"testing"
 	"time"
 )
@@ -199,7 +200,7 @@ var invalidSetTests = []struct {
 			"timeout": "2134",
 		},
 		"ns",
-		`time: missing unit in duration 2134`,
+		`time: missing unit in duration "?2134"?`,
 	},
 }
 
@@ -212,8 +213,13 @@ func TestOptionsApplyInvalid(t *testing.T) {
 				t.Fatalf("expected error %v not found", test.err)
 			}
 
-			if err.Error() != test.err {
-				t.Fatalf("expected error %q, got %q", test.err, err.Error())
+			matched, err := regexp.MatchString(test.err, err.Error())
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if !matched {
+				t.Fatalf("expected error to match %q, got %q", test.err, err.Error())
 			}
 		})
 	}
u/services/ldap.scm?id=fd579def37e638799ab8dff2d0d0fbb397ccaa36'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/services/ldap.scm'>
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<div class='path'>path: <a href='/guix/log/?id=fd579def37e638799ab8dff2d0d0fbb397ccaa36'>root</a>/<a href='/guix/log/gnu?id=fd579def37e638799ab8dff2d0d0fbb397ccaa36'>gnu</a>/<a href='/guix/log/gnu/services?id=fd579def37e638799ab8dff2d0d0fbb397ccaa36'>services</a>/<a href='/guix/log/gnu/services/ldap.scm?id=fd579def37e638799ab8dff2d0d0fbb397ccaa36'>ldap.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/ldap.scm?id=fd579def37e638799ab8dff2d0d0fbb397ccaa36&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-12-14 22:56:00 +0100'>2022-12-14</span></td><td><a href='/guix/commit/gnu/services/ldap.scm?id=82c511dd5489bd7a2cbcd0313b9f54f9d7f166d2'>gnu: slapd-configuration: Update default for run-dir.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/ldap.scm (slapd-configuration): Update default value for
run-dir to match defaults of 389-ds-base package.
* doc/guix.texi: Update documentation.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2022-12-14 20:55:04 +0100'>2022-12-14</span></td><td><a href='/guix/commit/gnu/services/ldap.scm?id=c6f81ff7a6a527b5a14189a2c359b981ddba43bc'>gnu: Add directory-server-service-type.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/ldap.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (LDAP Services): Document it.
</span></span></td><td>Ricardo Wurmus</td></tr>