fix CI

Author: Vipul-Cariappa

.github/workflows/CI.yml

@@ -35,23 +35,27 @@ jobs:
           key:
             ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles('ci/environment.yml') }}
 
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: mamba-org/setup-micromamba@v1
+        if: contains(matrix.os, 'ubuntu') || contains(matrix.os, 'macos')
         with:
-          miniconda-version: "latest"
-          auto-update-conda: true
           environment-file: ci/environment.yml
-          python-version: ${{ matrix.python-version }}
-          use-only-tar-bz2: true
+          create-args: >-
+            python=${{ matrix.python-version }}
+            bison=3.4
+            nodejs=18
+            symengine=0.12.0
+            sympy=1.11.1
 
-      - name: Install Windows Conda Packages
+      - uses: mamba-org/setup-micromamba@v1
         if: contains(matrix.os, 'windows')
-        shell: bash -e -l {0}
-        run: conda install m2-bison=3.0.4 cmake=3.21.1
-
-      - name: Install Linux / macOS Conda Packages
-        if: contains(matrix.os, 'ubuntu') || contains(matrix.os, 'macos')
-        shell: bash -e -l {0}
-        run: conda install bison=3.4 nodejs=18
+        with:
+          environment-file: ci/environment.yml
+          create-args: >-
+            python=${{ matrix.python-version }}
+            m2-bison=3.0.4
+            cmake=3.21.1
+            symengine=0.12.0
+            sympy=1.11.1
 
       - name: Conda info
         shell: bash -e -l {0}