Disable -Werror=nonnull on getcwd(0, 4096) because GCC incorrectly warns that
the second argument should be NULL with recent glibc.  See:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96832
https://sourceware.org/bugzilla/show_bug.cgi?id=26545

diff --git a/nss/coreconf/nsinstall/nsinstall.c b/nss/coreconf/nsinstall/nsinstall.c
--- a/nss/coreconf/nsinstall/nsinstall.c
+++ b/nss/coreconf/nsinstall/nsinstall.c
@@ -236,14 +236,20 @@ main(int argc, char **argv)
 	return 0;
 
     if (!cwd) {
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnonnull"
 	cwd = GETCWD(0, PATH_MAX);
+#pragma GCC diagnostic pop
 	if (!cwd)
 	    fail("could not get CWD");
     }
 
     /* make sure we can get into todir. */
     xchdir(todir);
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnonnull"
     todir = GETCWD(0, PATH_MAX);
+#pragma GCC diagnostic pop
     if (!todir)
 	fail("could not get CWD in todir");
     tdlen = strlen(todir);
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<tr><td><span title='2024-02-05 22:29:45 +0100'>2024-02-05</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=841fd4880a03d04bf20cc51fcc1a4c956d28d74c'>linux-container: Inherit essential services.</a><span class='msg-avail'>...<span class='msg-tooltip'>Currently it's not possible to set `essential-services' when building
operating systems for containers, since `container-essential-services'
always uses the defaults.

It's possible to reference `essential-services' from the operating
system that's passed in, but since it's thunked, the operating system
needs to be defined in two passes to avoid an infinite loop.

* gnu/system/linux-container.scm (container-essential-services): Use
operating-system-essential-services instead of the defaults to allow
overriding the base services.
(containerized-operating-system): Update accordingly.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
Change-Id: I81452487ef1ad01d3fa874c26d93a67d58ce6062
</span></span></td><td>Leo Nikkilä</td></tr>