forgot we don't have NEURON in Windows in CI

Author: apdavison

.github/workflows/full-test.yml

@@ -54,9 +54,12 @@ jobs:
     - name: Install PyNN itself
       run: |
         pip install -e .
-        pushd pyNN/neuron/nmodl
-        nrnivmodl
-        popd
+    - name: Compile NEURON mechanisms (Linux)
+        if: startsWith(matrix.os, 'ubuntu')
+        run: |
+          pushd pyNN/neuron/nmodl
+          nrnivmodl
+          popd
     - name: Run unit and system tests
       run: |
         pytest -v --cov=pyNN --cov-report=term test