Make manylinux wheels be always fast-building

https://github.com/pypa/python-manylinux-demo/issues/13 for details

2 files changed, 4 insertions, 3 deletions

diff --git a/ci/manylinux.sh b/ci/manylinux.sh
index 06618111..98dc874b 100755
--- a/ci/manylinux.sh
+++ b/ci/manylinux.sh
@@ -13,10 +13,12 @@ action=$1
 
 if [[ $action == "build" ]]; then
     # Compile wheels
+    cd /io
     for PYBIN in /opt/python/*/bin; do
-        "$PYBIN/pip" install -r /io/requirements/wheel.pip
-        "$PYBIN/pip" wheel /io/ -w wheelhouse/
+        "$PYBIN/pip" install -r requirements/wheel.pip
+        "$PYBIN/python" setup.py bdist_wheel -d ~/wheelhouse/
     done
+    cd ~
 
     # Bundle external shared libraries into the wheels
     for whl in wheelhouse/*.whl; do
diff --git a/howto.txt b/howto.txt
index ab532863..3044886c 100644
--- a/howto.txt
+++ b/howto.txt
@@ -49,7 +49,6 @@
     - Source kit and wheels:
         - $ make kit wheel
     - Linux wheels:
-        - this can be fast (3min) or slow (1h45m). not sure why.
         - $ make manylinux
     - Windows kits
         - wait for over an hour for Appveyor to build kits.