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-rw-r--r--nix/libstore/build.cc6
1 files changed, 4 insertions, 2 deletions
diff --git a/nix/libstore/build.cc b/nix/libstore/build.cc
index 7e61f968a6..c99bbed361 100644
--- a/nix/libstore/build.cc
+++ b/nix/libstore/build.cc
@@ -2009,9 +2009,11 @@ void DerivationGoal::runChild()
 
             /* Set the hostname etc. to fixed values. */
             char hostname[] = "localhost";
-            sethostname(hostname, sizeof(hostname));
+            if (sethostname(hostname, sizeof(hostname)) == -1)
+                throw SysError("cannot set host name");
             char domainname[] = "(none)"; // kernel default
-            setdomainname(domainname, sizeof(domainname));
+            if (setdomainname(domainname, sizeof(domainname)) == -1)
+                throw SysError("cannot set domain name");
 
             /* Make all filesystems private.  This is necessary
                because subtrees may have been mounted as "shared"