diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 64d6e739bc975c9bae43730445d92517b70a843f..1cd3a6c604633519abe193b63e9e1f25a5e61c43 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@
 #    script:
 #    - py_version=3.5
 #    - export PYOPENCL_TEST=nvi:titan
-#    - EXTRA_INSTALL="numpy mako"
+#    - EXTRA_INSTALL="pybind11 numpy mako"
 #    - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project.sh
 #    - ". ./build-and-test-py-project.sh"
 #    tags:
@@ -15,7 +15,7 @@ Python 3.5 K40:
     script:
     - export PY_EXE=python3.5
     - export PYOPENCL_TEST=nvi:k40
-    - export EXTRA_INSTALL="numpy mako"
+    - export EXTRA_INSTALL="pybind11 numpy mako"
     - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project.sh
     - ". ./build-and-test-py-project.sh"
     allow_failure: true
@@ -29,7 +29,7 @@ Python 2.7 POCL:
     script:
     - export PY_EXE=python2.7
     - export PYOPENCL_TEST=portable
-    - export EXTRA_INSTALL="numpy mako"
+    - export EXTRA_INSTALL="pybind11 numpy mako"
     - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project.sh
     - ". ./build-and-test-py-project.sh"
     tags:
@@ -42,7 +42,7 @@ Python 3.5 POCL:
     script:
     - export PY_EXE=python3.5
     - export PYOPENCL_TEST=portable
-    - export EXTRA_INSTALL="numpy mako"
+    - export EXTRA_INSTALL="pybind11 numpy mako"
     - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project.sh
     - ". ./build-and-test-py-project.sh"
     tags:
@@ -55,7 +55,7 @@ Python 3.6 POCL:
     script:
     - export PY_EXE=python3.6
     - export PYOPENCL_TEST=portable
-    - export EXTRA_INSTALL="numpy mako"
+    - export EXTRA_INSTALL="pybind11 numpy mako"
     - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project.sh
     - ". ./build-and-test-py-project.sh"
     tags:
@@ -66,7 +66,7 @@ Python 3.6 POCL:
 
 Documentation:
     script:
-    - EXTRA_INSTALL="numpy mako"
+    - EXTRA_INSTALL="pybind11 numpy mako"
     - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-docs.sh
     - ". ./build-docs.sh"
     tags: