diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a8284242f2007befa55f371368ec759d8bc2ffa7..82b4c637c4f8d9e9a72fa5c155b189d639e399cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,6 +53,12 @@ jobs:
             run: |
                 grep -v symengine .test-conda-env-py3.yml > .test-conda-env.yml
                 CONDA_ENVIRONMENT=.test-conda-env.yml
+
+                # https://gitlab.tiker.net/inducer/pytential/-/issues/146
+                echo "- _openmp_mutex=*=*gnu*" >> $CONDA_ENVIRONMENT
+
+                CISUPPORT_PARALLEL_PYTEST=no
+
                 curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project-within-miniconda.sh
                 . ./build-and-test-py-project-within-miniconda.sh
 
@@ -70,7 +76,7 @@ jobs:
                 echo "- llvm-openmp" >> .test-conda-env.yml
                 CONDA_ENVIRONMENT=.test-conda-env.yml
                 export PYTEST_ADDOPTS=${PYTEST_ADDOPTS:--k-slowtest}
-                set -o xtrace
+
                 curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project-within-miniconda.sh
                 . ./build-and-test-py-project-within-miniconda.sh
 
@@ -81,8 +87,13 @@ jobs:
         -   uses: actions/checkout@v2
         -   name: "Main Script"
             run: |
-                set -e
                 CONDA_ENVIRONMENT=.test-conda-env-py3.yml
+
+                # https://gitlab.tiker.net/inducer/pytential/-/issues/146
+                echo "- _openmp_mutex=*=*gnu*" >> $CONDA_ENVIRONMENT
+
+                CISUPPORT_PARALLEL_PYTEST=no
+
                 curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project-within-miniconda.sh
                 . ./build-and-test-py-project-within-miniconda.sh
 
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dae0a27cd0cd0b5a7687f5ee59d1bd33c24302ee..cf9a7713fa8ea2f82a33eba781a66e8647c3c5ac 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -61,6 +61,10 @@ Python 3 Conda:
   - export SUMPY_FORCE_SYMBOLIC_BACKEND=symengine
   - export CONDA_ENVIRONMENT=.test-conda-env-py3.yml
   - export PYTEST_ADDOPTS=${PYTEST_ADDOPTS:--k-slowtest}
+
+  # https://gitlab.tiker.net/inducer/pytential/-/issues/146
+  - echo "- _openmp_mutex=*=*gnu*" >> $CONDA_ENVIRONMENT
+
   - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project-within-miniconda.sh
   - ". ./build-and-test-py-project-within-miniconda.sh"
   tags:
diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index cb1f9027bcaee157cdde0f9983f94895cc2ae2ab..6c840cd81ca44dc9688ec7c437a729792bb78858 100644
--- a/.test-conda-env-py3.yml
+++ b/.test-conda-env-py3.yml
@@ -15,12 +15,3 @@ dependencies:
 - pyfmmlib
 - cython
 - gmsh
-
-- pip
-- pip:
-    - git+https://github.com/inducer/pytools
-    - git+https://gitlab.tiker.net/inducer/boxtree
-    - git+https://github.com/inducer/pymbolic
-    - git+https://github.com/inducer/loopy
-    - git+https://github.com/inducer/sumpy
-    - git+https://github.com/inducer/meshmode
diff --git a/requirements.txt b/requirements.txt
index 09d1ec0d7ac443491cbb98c0862231f9d73ff41d..b3a861ca2b07e8f372b1ff58d4aeedcc1a192f05 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,12 +1,12 @@
 numpy
-git+git://github.com/inducer/pytools
-git+git://github.com/inducer/pymbolic
+git+git://github.com/inducer/pytools#egg=pytools
+git+git://github.com/inducer/pymbolic#egg=pymbolic
 sympy==1.1.1
-git+https://github.com/inducer/modepy
-git+https://github.com/inducer/pyopencl
-git+https://github.com/inducer/islpy
-git+https://github.com/inducer/loopy
-git+https://github.com/inducer/boxtree
-git+https://github.com/inducer/meshmode
-git+https://github.com/inducer/sumpy
-git+https://github.com/inducer/pyfmmlib
+git+https://github.com/inducer/modepy#egg=modepy
+git+https://github.com/inducer/pyopencl#egg=pyopencl
+git+https://github.com/inducer/islpy#egg=islpy
+git+https://github.com/inducer/loopy#egg=loo.py
+git+https://github.com/inducer/boxtree#egg=boxtree
+git+https://github.com/inducer/meshmode#egg=meshmode
+git+https://github.com/inducer/sumpy#egg=sumpy
+git+https://github.com/inducer/pyfmmlib#egg=pyfmmlib