diff --git a/swmm-toolkit/pyproject.toml b/swmm-toolkit/pyproject.toml
new file mode 100644
index 00000000..bf989284
--- /dev/null
+++ b/swmm-toolkit/pyproject.toml
@@ -0,0 +1,9 @@
+[build-system]
+requires = [
+    "wheel>=0.38.1",
+    "setuptools>=42",
+    "scikit-build>=0.13",
+    "cmake>=3.21",
+    "swig==4.0.2",
+]
+build-backend = "setuptools.build_meta"
\ No newline at end of file
diff --git a/swmm-toolkit/setup.py b/swmm-toolkit/setup.py
index a4107512..93670c96 100644
--- a/swmm-toolkit/setup.py
+++ b/swmm-toolkit/setup.py
@@ -19,7 +19,7 @@
 import os
 from skbuild import setup
 from setuptools import Command
-
+import sys
 
 # Determine platform
 platform_system = platform.system()
@@ -56,11 +56,28 @@ def run(self):
         p.wait()
 
 
-# Set up location of wheel libraries depending on build platform
-if platform_system == "Windows":
-    package_dir = {"swmm_toolkit":"bin", "swmm.toolkit": "src/swmm/toolkit"}
+# Set up location of wheel libraries depending on build platform and command
+# commands that trigger cmake from skbuild.setuptools_wrap._should_run_cmake
+commands_that_trigger_cmake = {
+        "build",
+        "build_ext",
+        "develop",
+        "install",
+        "install_lib",
+        "bdist",
+        "bdist_dumb",
+        "bdist_egg",
+        "bdist_rpm",
+        "bdist_wininst",
+        "bdist_wheel",
+        "test",
+    }
+command = sys.argv[1] if len(sys.argv) > 1 else None
+if command in commands_that_trigger_cmake:
+    swmm_toolkit_dir= "bin" if platform_system == "Windows" else "lib"
 else:
-    package_dir = {"swmm_toolkit":"lib", "swmm.toolkit": "src/swmm/toolkit"}
+    swmm_toolkit_dir= "swmm-solver"
+package_dir = {"swmm_toolkit" : swmm_toolkit_dir, "swmm.toolkit": "src/swmm/toolkit"}
 
 
 if os.environ.get('SWMM_CMAKE_ARGS') is not None:
@@ -88,7 +105,6 @@ def exclude_files(cmake_manifest):
 here = pathlib.Path(__file__).parent.resolve()
 long_description = (here / 'README.md').read_text(encoding='utf-8')
 
-
 setup(
     name = "swmm-toolkit",
     version = "0.14.2",
@@ -127,4 +143,4 @@ def exclude_files(cmake_manifest):
         "Programming Language :: C",
         "Development Status :: 5 - Production/Stable",
     ]
-)
+)
\ No newline at end of file
diff --git a/swmm-toolkit/test-requirements.txt b/swmm-toolkit/test-requirements.txt
index 1d649ff1..cbb4f032 100644
--- a/swmm-toolkit/test-requirements.txt
+++ b/swmm-toolkit/test-requirements.txt
@@ -3,5 +3,5 @@
 
 pytest == 7.1.1
 numpy  == 1.21.6; python_version == "3.7"
-numpy  == 1.22.0; python_version >= "3.8"
+numpy  == 1.24.4; python_version >= "3.8"
 aenum  == 3.1.11