typo

Author: ljwoods2

.github/workflows/ci.yaml

@@ -47,7 +47,7 @@ jobs:
               context: ./docker/gromacs
               push: false
               build-args: 
-                GMX_OPTS='"${{ matrix.GMX_OPTS }}"'
+                GMX_OPTS='"${{ env.GMX_OPTS }}"'
 
     build-lammps-image:
       runs-on: ubuntu-latest
@@ -87,7 +87,7 @@ jobs:
             context: ./docker/lammps
             push: false
             build-args: |
-              LMP_OPTS='"${{ matrix.LMP_OPTS }}"'
+              LMP_OPTS='"${{ env.LMP_OPTS }}"'
         
     build-common-image:
         runs-on: ubuntu-latest