fixing github action...?

.github/workflows/build.yml

@@ -11,12 +11,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
         include:
           - os: ubuntu-latest
             compiler: gcc-11
-          - os: macos-latest
-            compiler: gcc-15
 
     steps:
     - uses: actions/checkout@v4
@@ -29,12 +27,7 @@ jobs:
         environment-file: environment.yml
         python-version: '3.11'
         auto-update-conda: true
-
-    - name: Install dependencies via conda-forge
-      shell: bash -l {0}
-      run: |
-        conda install -y -c conda-forge compilers openmpi "hdf5=*=mpi_openmpi*" "fftw=*=mpi_openmpi*" cmake doxygen git
-
+
     - name: Build PFUnit
       shell: bash -l {0}
       run: |

environment.yml

@@ -0,0 +1,13 @@
+name: puffin
+channels:
+  - conda-forge
+dependencies:
+  - compilers
+  - openmpi
+  - hdf5=*=mpi_openmpi*
+  - fftw=*=mpi_openmpi*
+  - cmake
+  - doxygen
+  - git
+  - python=3.11
+  - zlib