Install more packages to cover more components:

    ./configure
    [...]
    host CPU          x86_64
    strip binaries    yes
    Cocoa support     yes
    TLS priority      NORMAL
    GNUTLS support    yes
    nettle            yes (3.4.1)
    libtasn1          yes
    PAM               yes
    iconv support     yes
    curses support    no
    curl support      yes
    Audio drivers     coreaudio
    vde support       yes
    HAX support       yes
    HVF support       yes
    TCG support       yes
    vhost-net support yes
    vhost-crypto support yes
    vhost-user support yes
    vhost-user-fs support yes
    libusb            yes
    libiscsi support  yes
    libssh support    yes
    lzo support       yes
    snappy support    yes
    bzip2 support     yes
    lzfse support     yes
    [...]

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 .travis.yml | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 5887055951..08ef2c011c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -279,10 +279,19 @@ matrix:
         homebrew:
           packages:
             - ccache
+            - libgcrypt
+            - libiscsi
+            - libssh2
+            - libusb
+            - lzfse
+            - lzo
+            - gettext
             - glib
-            - pixman
             - gnu-sed
+            - pixman
             - python
+            - snappy
+            - vde
           update: true
       before_script:
         - brew link --overwrite python
-- 
2.21.1