Update ci.yml

Author: jkmckenna

.github/workflows/ci.yml

@@ -71,6 +71,17 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Install system deps for pysam
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            build-essential \
+            zlib1g-dev \
+            libbz2-dev \
+            liblzma-dev \
+            libcurl4-openssl-dev \
+            pkg-config
+
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip