diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0b6a4ba0191bb30ae3b8da6e4448aba906b6982b..7ce2e4dbb1d0a886ebbfee7c1393bddea9be24c6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,6 +35,7 @@ jobs:
                 sed 's/python=3/python=2.7/' .test-conda-env-py3.yml > .test-conda-env-py2.yml
                 CONDA_ENVIRONMENT=.test-conda-env-py2.yml
                 curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project-within-miniconda.sh
+                ./configure.py --cl-inc-dir="$CONDA_PREFIX/include"
                 . ./build-and-test-py-project-within-miniconda.sh
 
     pytest3:
@@ -47,6 +48,7 @@ jobs:
                 set -e
                 CONDA_ENVIRONMENT=.test-conda-env-py3.yml
                 curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project-within-miniconda.sh
+                ./configure.py --cl-inc-dir="$CONDA_PREFIX/include"
                 . ./build-and-test-py-project-within-miniconda.sh
 
 # vim: sw=4