diff --git a/.github/workflows/ci-scripts-build.yml b/.github/workflows/ci-scripts-build.yml
index c46ce43..0bbc685 100644
--- a/.github/workflows/ci-scripts-build.yml
+++ b/.github/workflows/ci-scripts-build.yml
@@ -1,7 +1,7 @@
 name: pyDevSup
 
 # Trigger on pushes and PRs to any branch
-on: [push, pull_request]
+on: [push, pull_request, workflow_dispatch]
 
 env:
     SETUP_PATH: .ci-local:.ci
@@ -159,6 +159,8 @@ jobs:
             python: "3.7"
             container: "python:3.7"
             profile: deb10
+            test: # no - RuntimeError: Requires Base >=3.15 for iocBuildIsolated()
+
     steps:
     - uses: actions/checkout@v3
       with:
diff --git a/devsupApp/src/dbfield.c b/devsupApp/src/dbfield.c
index 94da410..5e9e269 100644
--- a/devsupApp/src/dbfield.c
+++ b/devsupApp/src/dbfield.c
@@ -3,7 +3,6 @@
 #undef _POSIX_C_SOURCE
 #undef _XOPEN_SOURCE
 
-#include <Python.h>
 #ifdef HAVE_NUMPY
 #include <numpy/ndarrayobject.h>
 #endif
@@ -118,15 +117,15 @@ static int assign_array(DBADDR *paddr, PyObject *arr)
 #ifdef HAVE_NUMPY
     void *rawfield = paddr->pfield;
     rset *prset;
-    PyObject *aval;
-    PyArrayObject *array = (PyArrayObject *)arr;
+    PyArrayObject *aval;
+    PyArrayObject * array = (PyArrayObject *)arr;
     unsigned elemsize = dbValueSize(paddr->field_type);
     unsigned long maxlen = paddr->no_elements, insize;
     PyArray_Descr *desc = dbf2np[paddr->field_type];
 
     if(paddr->field_type==DBF_STRING &&
-        (PyArray_NDIM(array) != 2 ||
-         PyArray_DIM(array, 0) > (npy_intp) maxlen ||
+        (PyArray_NDIM(array) != 2 || 
+         PyArray_DIM(array, 0) > (npy_intp) maxlen || 
          PyArray_DIM(array, 1) != MAX_STRING_SIZE))
     {
         PyErr_Format(PyExc_ValueError, "String array has incorrect shape or is too large");
@@ -159,17 +158,17 @@ static int assign_array(DBADDR *paddr, PyObject *arr)
     }
 
     Py_XINCREF(desc);
-    if(!(aval = PyArray_FromAny(arr, desc, 1, 2, NPY_ARRAY_C_CONTIGUOUS | NPY_ARRAY_ALIGNED | NPY_ARRAY_WRITEABLE, arr)))
+    if(!(aval = (PyArrayObject *)PyArray_FromAny(arr, desc, 1, 2, NPY_ARRAY_C_CONTIGUOUS | NPY_ARRAY_ALIGNED | NPY_ARRAY_WRITEABLE, arr)))
         return 1;
 
-    if(elemsize!=PyArray_ITEMSIZE((PyArrayObject *)aval)) {
+    if(elemsize!=PyArray_ITEMSIZE(aval)) {
         PyErr_Format(PyExc_AssertionError, "item size mismatch %u %u",
-                     elemsize, (unsigned)PyArray_ITEMSIZE((PyArrayObject *)aval));
+                    elemsize, (unsigned)PyArray_ITEMSIZE(aval) );
         Py_DECREF(aval);
         return 1;
     }
 
-    memcpy(rawfield, PyArray_GETPTR1((PyArrayObject *)aval, 0), insize*elemsize);
+    memcpy(rawfield, PyArray_GETPTR1(aval, 0), insize*elemsize);
 
     Py_DECREF(aval);
 
diff --git a/devsupApp/src/devsup/disect.py b/devsupApp/src/devsup/disect.py
index d166f74..b826361 100644
--- a/devsupApp/src/devsup/disect.py
+++ b/devsupApp/src/devsup/disect.py
@@ -4,6 +4,7 @@
 
 import sys, gc, inspect, time
 try:
+    InstanceType = None
     from types import InstanceType
 except ImportError:
     pass # py3
diff --git a/documentation/index.rst b/documentation/index.rst
index e3a86d1..fd5ad57 100644
--- a/documentation/index.rst
+++ b/documentation/index.rst
@@ -11,9 +11,18 @@ pydevsup documentation
 It currently supports EPICS >=3.14.12 and python versions >=3.6
 The numpy package is also required.
 
-The source can be found at http://github.com/mdavidsaver/pyDevSup
-
-File releases are available at https://github.com/mdavidsaver/pyDevSup/releases
+It is not possible to use the module with a static build configuration.
+The code will build, but it will not work.
+The reason is that EPICS database defintions are created in two modules:
+1. The _dbapi module creates the defintion of 'Python Device'.
+2. The softIocPy module implements device types such as longin that use 'Python Device'.
+   In a static build, these are held in seperate EPICS databases.
+   Consequently the softIocPy module does not know what a 'Python Device' is.
+   In a shared library build there is ony one database, held by the underlying EPICS base library.
+
+The source can be found at http://github.com/epics-modules/pyDevSup
+
+File releases are available at https://github.com/epics-modules/pyDevSup/releases
 
 Contents:
 
diff --git a/pyIocApp/setup.c b/pyIocApp/setup.c
index 61c3861..0f87fe2 100644
--- a/pyIocApp/setup.c
+++ b/pyIocApp/setup.c
@@ -130,7 +130,10 @@ static void cleanupPrep(initHookState state)
 static void pySetupReg(void)
 {
     Py_InitializeEx(0);
+#if NPY_TARGET_VERSION < NPY_1_9_API_VERSION
+    /* See https://docs.python.org/3/whatsnew/3.9.html */
     PyEval_InitThreads();
+#endif
 
     setupPyPath();
 
diff --git a/requirements-deb10.txt b/requirements-deb10.txt
index 91aeff2..039a17d 100644
--- a/requirements-deb10.txt
+++ b/requirements-deb10.txt
@@ -1,3 +1,2 @@
 numpy==1.16.2
-#nose==1.3.7
 nose2