Patch will be included upstream in 1.47: https://github.com/rust-lang/rust/pull/74416
diff --git a/src/librustc_codegen_ssa/back/linker.rs b/src/librustc_codegen_ssa/back/linker.rs
index e64aafa599f..12575ac4358 100644
--- a/src/librustc_codegen_ssa/back/linker.rs
+++ b/src/librustc_codegen_ssa/back/linker.rs
@@ -28,7 +28,7 @@ use rustc_target::spec::{LinkOutputKind, LinkerFlavor, LldFlavor};
 pub fn disable_localization(linker: &mut Command) {
     // No harm in setting both env vars simultaneously.
     // Unix-style linkers.
-    linker.env("LC_ALL", "C");
+    linker.env("LC_ALL", "en_US.UTF-8");
     // MSVC's `link.exe`.
     linker.env("VSLANG", "1033");
 }
a49455f0f'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=4091b6c4c2b76ac9308e8449e2b58c6a49455f0f'>refs</a><a class='active' href='/guix/log/tests/guix-build-branch.sh'>log</a><a href='/guix/tree/tests/guix-build-branch.sh?id=4091b6c4c2b76ac9308e8449e2b58c6a49455f0f'>tree</a><a href='/guix/commit/tests/guix-build-branch.sh?id=4091b6c4c2b76ac9308e8449e2b58c6a49455f0f'>commit</a><a href='/guix/diff/tests/guix-build-branch.sh?id=4091b6c4c2b76ac9308e8449e2b58c6a49455f0f'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/guix-build-branch.sh'>
<input type='hidden' name='id' value='4091b6c4c2b76ac9308e8449e2b58c6a49455f0f'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=4091b6c4c2b76ac9308e8449e2b58c6a49455f0f'>root</a>/<a href='/guix/log/tests?id=4091b6c4c2b76ac9308e8449e2b58c6a49455f0f'>tests</a>/<a href='/guix/log/tests/guix-build-branch.sh?id=4091b6c4c2b76ac9308e8449e2b58c6a49455f0f'>guix-build-branch.sh</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/tests/guix-build-branch.sh?id=4091b6c4c2b76ac9308e8449e2b58c6a49455f0f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-09-28 21:06:36 -0500'>2020-09-28</span></td><td><a href='/guix/commit/tests/guix-build-branch.sh?id=d8934360d2453a403b5433e71d09188e4ed23b57'>tests: Simplify shell exit status negation;</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-lint.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh: Use the shell '!' keyword to negate command exit status
in place of 'if ...; then false; else true; fi'
</span></span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2020-04-04 18:52:36 +0200'>2020-04-04</span></td><td><a href='/guix/commit/tests/guix-build-branch.sh?id=3cea55078857ecd8ca67fd7cf4eaebb13fb6d9d3'>tests: Adjust '--with-commit' test for tags.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to efa578ecaece67366b4b0e2266de7c2faaa4ae54.

* tests/guix-build-branch.sh: Adjust '--with-commit=guile-gcrypt=v0.1.0'
test to expect the tag ID rather than the commit ID.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-09-04 13:02:27 +0200'>2019-09-04</span></td><td><a href='/guix/commit/tests/guix-build-branch.sh?id=3c82f1254116be2a9216b7c7e5e8c001ff486270'>tests: Adjust '--with-commit' test.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 4d04bc50d2df32be326e0f48f378dc581f873989.

* tests/guix-build-branch.sh: Expect "v0.1.0" to lead to
"guile-gcrypt-0.1.0".
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-26 11:21:36 +0200'>2019-07-26</span></td><td><a href='/guix/commit/tests/guix-build-branch.sh?id=10a8c2bbc6754bddb0e5d668b3ecc9050efd820b'>git: 'switch-to-ref' resolves tag targets.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/git.scm (switch-to-ref): In the 'tag' case, resolve the target of
the tag.
* tests/guix-build-branch.sh: Adjust test accordingly.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-26 11:21:36 +0200'>2019-07-26</span></td><td><a href='/guix/commit/tests/guix-build-branch.sh?id=177fecb57c0c9e15249bf6a49244c9dc6eb8439c'>git: &lt;git-checkout&gt; allows tags in its 'commit' field.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/36371&gt;.
Reported by Tobias Geerinckx-Rice &lt;me@tobias.gr&gt;.

* guix/git.scm (git-checkout-compiler): Pass 'tag-or-commit' to
'latest-repository-commit*'.
* doc/guix.texi (Package Transformation Options): Update '--with-commit'
documentation accordingly.
* tests/guix-build-branch.sh: Add test.
</span></span></td><td>Ludovic Courtès</td></tr>