diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 595dbb0f..cb64ae20 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,22 +20,26 @@ jobs:
       fail-fast: false
       
       matrix:
+        c_compiler: [gcc, clang]
         writer: [ON, OFF]
         include:
-          - desc: gcc11 # /C++17 boost1.8 exr3.1
+          - c_compiler: gcc
+            desc: gcc11 # /C++17 boost1.8 exr3.1
             nametag: linux-vfx2023
             os: ubuntu-latest
             container: aswf/ci-osl:2023-clang15
             vfxyear: 2023
+            cxx_compiler: g++
             cxx_std: 17
-          - desc: clang15 # /C++17 boost1.8 exr3.1
+          - c_compiler: clang
+            desc: clang15 # /C++17 boost1.8 exr3.1
             nametag: linux-vfx2022-clang13
             os: ubuntu-latest
             container: aswf/ci-osl:2023-clang15
             vfxyear: 2023
-            cc_compiler: clang
             cxx_compiler: clang++
             cxx_std: 17
+            
     env:
       CXX: ${{matrix.cxx_compiler}}
       CC: ${{matrix.cc_compiler}}
diff --git a/build_scripts/install_deps_linux.bash b/build_scripts/install_deps_linux.bash
index adaae04b..642e0569 100755
--- a/build_scripts/install_deps_linux.bash
+++ b/build_scripts/install_deps_linux.bash
@@ -5,7 +5,7 @@ set -ex
 time sudo apt-get update
 
 time sudo apt-get -q -f install -y \
-    libunwind-dev \
+    libunwind-dev libopenexr-dev \
     libboost-dev libboost-filesystem-dev \
     libboost-test-dev \
     libraw-dev libceres-dev