another try

.github/workflows/tox-pytest.yml

@@ -25,9 +25,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # os: [ubuntu-latest, macos-latest, windows-latest]
-        os: [ubuntu-latest, macos-latest]
-        # python-version: ['3.9']
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ['3.8', '3.9', '3.10']
         poetry-version: ['1.8.3']
         include:
@@ -73,6 +71,7 @@ jobs:
         run: brew install graphviz
 
       - name: Debug
+        if: matrix.os == 'windows-latest' && matrix.python-version == '3.8'
         env:
           PYTHON_SETUP_VERSION: ${{ steps.setup-python.outputs.python-version}}
           CACHE_KEY: ${{ format(matrix.poetry-cache-key-fmt, matrix.poetry-version, matrix.os, steps.setup-python.outputs.python-version) }}

pyproject.toml

@@ -15,7 +15,7 @@ python = "^3.8"
 bidict = "^0.23.1"
 click = "^8.1.7"
 # For Linux, Mac (not M1), and Windows
-cvxopt = {version="^1.3.2", markers='sys_platform != "darwin" or platform_machine == "x86_64"'}
+cvxopt = {version="^1.3.2", markers='sys_platform != "darwin" or platform_machine == "x86_64" or python'}
 distinctipy = "^1.3.4"
 graphviz = "^0.20.3"
 gurobipy = {version="10.0.3"}
@@ -24,7 +24,7 @@ gymnasium = "^0.29.1"
 ipykernel = "^6.29.5"
 ipython = "^8.12.3"
 # For MacOS M1
-kvxopt={version="1.3.2.0", markers='sys_platform == "darwin" and platform_machine != "x86_64"'}
+kvxopt={version="1.3.2.0", markers='sys_platform == "darwin" and platform_machine != "x86_64"', python = ">=3.9"} # 3.8 not supported. 3.8 gives an error. "This error originates from the build backend, and is likely not a problem with poetry but with cvxopt (1.3.2) not supporting PEP 517 builds"
 ltlf2dfa = "^1.0.1"
 matplotlib = "^3.7.5"
 moviepy = "^1.0.3"