Version 3.5.11 added a test to check that the default trust store is readable.
It does not exist in the build environment, so pretend everything is fine.

diff a/tests/trust-store.c b/tests/trust-store.c
--- a/tests/trust-store.c
+++ b/tests/trust-store.c
@@ -61,7 +61,7 @@
 	} else if (ret < 0) {
 		fail("error loading system trust store: %s\n", gnutls_strerror(ret));
 	} else if (ret == 0) {
-		fail("no certificates were found in system trust store!\n");
+		success("no trust store in the Guix build environment!\n");
 	}
 
 	gnutls_certificate_free_credentials(x509_cred);
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<div class='path'>path: <a href='/guix/log/?id=a564ff1b61fb3061e0a66f74ae2518c07d8e2dc1'>root</a>/<a href='/guix/log/gnu?id=a564ff1b61fb3061e0a66f74ae2518c07d8e2dc1'>gnu</a>/<a href='/guix/log/gnu/packages?id=a564ff1b61fb3061e0a66f74ae2518c07d8e2dc1'>packages</a>/<a href='/guix/log/gnu/packages/nfs.scm?id=a564ff1b61fb3061e0a66f74ae2518c07d8e2dc1'>nfs.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/packages/nfs.scm?id=a564ff1b61fb3061e0a66f74ae2518c07d8e2dc1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-12-10 17:01:31 +0100'>2020-12-10</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=64098437081d8752d95ca9d065bf8367bd5ffb08'>gnu: nfs-utils: Fix location of external util-linux binaries.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-09-24 14:01:29 -0400'>2020-09-24</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=d14a3e5c0c5b7b5e2d4efcc5076abbe9e4c03f50'>gnu: nfs-utils: Do not generate static libraries.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-07-30 00:57:27 +0200'>2020-07-30</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=d4a044239b7af83e54d5c44dab3ea3299a946d9b'>gnu: Add nfs4-acl-tools.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2020-05-26 00:19:39 +0200'>2020-05-26</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=6302b5dafe74aeb17f447af0c76c0afb6888a747'>gnu: nfs-utils: Update to 2.4.3.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-04-08 13:00:50 +0200'>2020-04-08</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=27783023993f9272ce422868d14529159c4a5218'>Merge branch 'master' into core-updates</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-04-04 22:05:01 -0400'>2020-04-04</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=084d15656342f6c69a1448c2d41f27e8499bd61d'>gnu: nfs-utils: Fix the shebangs of the Python based tools.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>