diff --git a/conda.recipe/meta.yaml b/conda.recipe/meta.yaml
index 8a1b54ec7..229760264 100644
--- a/conda.recipe/meta.yaml
+++ b/conda.recipe/meta.yaml
@@ -39,6 +39,9 @@ requirements:
     - scikit-image
     - scikit-learn
     - scipy
+    # TBB seems to be a little faster than OpenMP for the cases I've tried.
+    # Installing TBB means numba will use it instead of OpenMP.
+    - tbb
     - tqdm
 
 test:
diff --git a/pyproject.toml b/pyproject.toml
index 46e6a3155..dc9d6a44b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,2 +1,2 @@
 [build-system]
-requires = ["setuptools", "wheel", "numpy<1.25", "setuptools_scm[toml]"]
+requires = ["setuptools", "wheel", "numpy<1.27", "setuptools_scm[toml]"]
diff --git a/setup.py b/setup.py
index 337bb54f8..5c7967216 100644
--- a/setup.py
+++ b/setup.py
@@ -9,17 +9,20 @@
 np_include_dir = numpy.get_include()
 
 install_reqs = [
+    'appdirs',
     'fabio>=0.11',
     'fast-histogram',
     'h5py',
     'lmfit',
     'numba',
-    'numpy<1.25',  # NOTE: bump this to support the latest version numba supports
+    'numpy<1.27',  # NOTE: bump this to support the latest version numba supports
     'psutil',
     'pycifrw',
     'pyyaml',
+    'scikit-image',
     'scikit-learn',
     'scipy',
+    'tbb',
     'tqdm',
     'xxhash',
 ]
@@ -33,15 +36,6 @@
 else:
     compiler_optimize_flags = []
 
-# This a hack to get around the fact that scikit-image on conda-forge doesn't install
-# dist info so setuptools can't find it, even though its there, which results in
-# pkg_resources.DistributionNotFound, even though the package is available. So we
-# only added it if we aren't building with conda.
-# appdirs has the same issue.
-if os.environ.get('CONDA_BUILD') != '1':
-    install_reqs.append('scikit-image')
-    install_reqs.append('appdirs')
-
 
 # extension for convolution from astropy
 def get_convolution_extensions():
@@ -102,7 +96,7 @@ def get_extension_modules():
 # use entry_points, not scripts:
 entry_points = {
     'console_scripts': ["hexrd = hexrd.cli.main:main"]
-    }
+}
 
 setup(
     name='hexrd',
@@ -134,12 +128,3 @@ def get_extension_modules():
     python_requires='>=3.8',
     install_requires=install_reqs
 )
-
-# ext_modules = get_extension_modulesf()
-# setupF(
-#     name='hexrd',
-#     url='https://github.com/cryos/hexrd',
-#     license='BSD',
-#     ext_modules=ext_modules,
-#     packages=find_packages(),
-# )