diff --git a/.travis.yml b/.travis.yml
index 3cadc4ed..bd106ecd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,9 @@ matrix:
         os: linux
       - language: python
         python: 3.5
-        env: JULIA_VERSION=juliareleases
+        env:
+          - JULIA_VERSION=juliareleases
+          - CROSS_VERSION=1
         os: linux
       - language: python
         python: 3.5
@@ -65,7 +67,6 @@ before_script:
   - which ${PYTHON:-python}
 script:
   - julia -e 'Pkg.add("PyCall")'
-  - julia -e 'Pkg.checkout("PyCall"); Pkg.build("PyCall")'
   - /usr/bin/python --version
   - PYTHON=${PYTHON:-python}
   - echo $PYTHON
diff --git a/appveyor.yml b/appveyor.yml
index 0f94101c..9a45dbf1 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -70,7 +70,7 @@ build_script:
   # - C:\projects\julia\bin\julia -e "versioninfo(); Pkg.add(\"PyCall\"); Pkg.init(); Pkg.resolve()"
   # - C:\projects\julia\bin\julia -e "using PyCall; @assert isdefined(:PyCall); @assert typeof(PyCall) === Module"
   - "SET PYTHON=%PYTHONDIR%\\python.exe"
-  - C:\projects\julia\bin\julia -e "versioninfo(); Pkg.add(\"PyCall\"); Pkg.checkout(\"PyCall\"); Pkg.build(\"PyCall\")"
+  - C:\projects\julia\bin\julia -e "versioninfo(); Pkg.add(\"PyCall\")"
 
 test_script:
   - "SET PATH=%PYTHONDIR%;%PYTHONDIR%\\Scripts;C:\\projects\\julia\\bin;%PATH%"