diff --git a/.travis.yml b/.travis.yml
index f2b78afc..83c5ab6a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,9 @@ before_script:
     --with-jpeg-includes=$JPEG/include
     --with-jpeg-libraries=$JPEG/lib
   - cat config.log
+  - echo PKG_CONFIG_PATH = $PKG_CONFIG_PATH
+  - echo ls /usr/local/lib/pkgconfig ; ls /usr/local/lib/pkgconfig
+  - echo which pkg-config ; which pkg-config
   - make -j$JOBS -s V=0
 script:
   - make -Ctest -j$JOBS -s V=0 VERBOSE=1 check