gsasl: export LOCALDOMAIN before running tests

Recently kerberos added a code path that relies ont he local domain part
to be available. See [hydra] for the recent build failure and [github]
for a brief analysis of the error.

[hydra] https://hydra.nixos.org/build/113717403
[github]:
  - https://github.com/NixOS/nixpkgs/pull/81531#issuecomment-593840860
  - https://github.com/NixOS/nixpkgs/pull/81531#issuecomment-593853565

1 files changed, 7 insertions, 4 deletions

diff --git a/pkgs/development/libraries/gsasl/default.nix b/pkgs/development/libraries/gsasl/default.nix
index 899aa116b2ca..c5e1deea6e12 100644
--- a/pkgs/development/libraries/gsasl/default.nix
+++ b/pkgs/development/libraries/gsasl/default.nix
@@ -12,16 +12,19 @@ stdenv.mkDerivation rec {
 
   configureFlags = [ "--with-gssapi-impl=mit" ];
 
+  preCheck = ''
+    export LOCALDOMAIN="dummydomain"
+  '';
   doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = {
     description = "GNU SASL, Simple Authentication and Security Layer library";
 
     longDescription =
-      '' GNU SASL is a library that implements the IETF Simple 
-         Authentication and Security Layer (SASL) framework and 
-         some SASL mechanisms. SASL is used in network servers 
-         (e.g. IMAP, SMTP, etc.) to authenticate peers. 
+      '' GNU SASL is a library that implements the IETF Simple
+         Authentication and Security Layer (SASL) framework and
+         some SASL mechanisms. SASL is used in network servers
+         (e.g. IMAP, SMTP, etc.) to authenticate peers.
        '';
 
     homepage = https://www.gnu.org/software/gsasl/;