nixos/testing: Use stripped down tesseract only.

Only include the English language for the VM tests, because we most
likely won't need other languages. At least for now.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

nixos/lib/testing.nix

@@ -91,6 +91,8 @@ rec {
 
       vms = map (m: m.config.system.build.vm) (lib.attrValues nodes);
 
+      ocrProg = tesseract.override { enableLanguages = [ "eng" ]; };
+
       # Generate onvenience wrappers for running the test driver
       # interactively with the specified network, and for starting the
       # VMs from the command line.
@@ -107,14 +109,14 @@ rec {
           vms="$(for i in ${toString vms}; do echo $i/bin/run-*-vm; done)"
           wrapProgram $out/bin/nixos-test-driver \
             --add-flags "$vms" \
-            ${lib.optionalString enableOCR "--prefix PATH : '${tesseract}/bin'"} \
+            ${lib.optionalString enableOCR "--prefix PATH : '${ocrProg}/bin'"} \
             --run "testScript=\"\$(cat $out/test-script)\"" \
             --set testScript '"$testScript"' \
             --set VLANS '"${toString vlans}"'
           ln -s ${testDriver}/bin/nixos-test-driver $out/bin/nixos-run-vms
           wrapProgram $out/bin/nixos-run-vms \
             --add-flags "$vms" \
-            ${lib.optionalString enableOCR "--prefix PATH : '${tesseract}/bin'"} \
+            ${lib.optionalString enableOCR "--prefix PATH : '${ocrProg}/bin'"} \
             --set tests '"startAll; joinAll;"' \
             --set VLANS '"${toString vlans}"' \
             ${lib.optionalString (builtins.length vms == 1) "--set USE_SERIAL 1"}