Travis-CI: 'apt-get update' is required

diff --git a/extras/build-tests/nix/select-config b/extras/build-tests/nix/select-config
index 17023748af21ed851dd1c8d3a599d222737eebb9..f7ab1e2430d658ca88d4f6c35eb1f8cde90445a3 100755 (executable)
--- a/extras/build-tests/nix/select-config
+++ b/extras/build-tests/nix/select-config
@@ -32,6 +32,7 @@ cp extras/build-tests/nix/configs/default ./config.settings
 # Also for our FreeBSD machine we have to uninstall some stuff since a clean
 # environment is not guaranteed...
 if [ "$OSTYPE" = "linux-gnu" ]; then
+       sudo apt-get -qq update
        sudo apt-get install libtool -qq
 elif [[ "$OSTYPE" == "freebsd"* ]]; then
        sudo pkg install -y libtool