diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e8dec8e550fc11326b6e002a52d28bd1f7deb05e..64987fd0b3aad7c9dadb92e43c874687a3b1f220 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -58,8 +58,8 @@ jobs:
         -   uses: actions/checkout@v2
         -   name: "Main Script"
             run: |
-                curl -L -O https://gitlab.tiker.net/inducer/ci-support/raw/main/ci-support.sh
-                . ./ci-support.sh
+                curl -L -O https://tiker.net/ci-support-v0
+                . ./ci-support-v0
                 build_py_project_in_conda_env
                 test_py_project
 
@@ -107,7 +107,7 @@ jobs:
                 python-version: '3.x'
         -   name: "Main Script"
             run: |
-                curl -L -O https://gitlab.tiker.net/inducer/ci-support/raw/main/ci-support.sh
+                curl -L -O https://tiker.net/ci-support-v0
                 . ci-support.sh
                 build_py_project_in_conda_env
                 conda install graphviz
@@ -128,6 +128,9 @@ jobs:
             env:
                 DOWNSTREAM_PROJECT: ${{ matrix.downstream_project }}
             run: |
+                curl -L -O https://tiker.net/ci-support-v0
+                . ./ci-support-v0
+
                 if test "$DOWNSTREAM_PROJECT" = "mirgecom"; then
                     git clone "https://github.com/illinois-ceesd/$DOWNSTREAM_PROJECT.git"
                 else
@@ -138,7 +141,7 @@ jobs:
                 echo "*** $DOWNSTREAM_PROJECT version: $(git rev-parse --short HEAD)"
 
                 # Use this version of arraycontext instead of what downstream would install
-                sed -i "/egg=arraycontext/ c git+file://$(readlink -f ..)#egg=arraycontext" requirements.txt
+                edit_requirements_txt_for_downstream_in_subdir
 
                 # Avoid slow or complicated tests in downstream projects
                 export PYTEST_ADDOPTS="-k 'not (slowtest or octave or mpi)'"
@@ -153,8 +156,6 @@ jobs:
                     sed -i "/mpi4py/ d" requirements.txt
                 fi
 
-                curl -L -O https://tiker.net/ci-support-v0
-                . ./ci-support-v0
                 build_py_project_in_conda_env
                 test_py_project