diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0470d18..3fc8369 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,7 +1,6 @@
 name: ci
 
 env:
-  CMAKE_BUILD_PARALLEL_LEVEL: 3
   CTEST_PARALLEL_LEVEL: 3
   CMAKE_BUILD_TYPE: Release
 
@@ -42,7 +41,33 @@ jobs:
     - name: build examples
       run: cmake --build Examples/build --parallel
     - name: Test examples
-      run: ctest --test-dir Examples/build --output-on-failure
+      run: ctest --test-dir Examples/build -V
+
+
+  linux-build:
+    needs: linux
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: install libs
+      run: |
+        sudo apt update -yq
+        sudo apt install -yq --no-install-recommends libhdf5-dev
+
+    - run: cmake --preset build -B build --install-prefix=${HOME}
+    - run: cmake --build build
+    - run: ctest --test-dir build --preset default
+    - run: cmake --install build
+
+    - name: configure examples
+      run: cmake -S Examples -B Examples/build -Dnc4fortran_ROOT=${HOME}
+    - name: build examples
+      run: cmake --build Examples/build --parallel
+    - name: Test examples
+      run: ctest --test-dir Examples/build -V
 
 
   mac:
@@ -70,4 +95,31 @@ jobs:
 
     - run: cmake -S Examples -B Examples/build -Dnc4fortran_ROOT=${HOME}
     - run: cmake --build Examples/build --parallel
-    - run: ctest --test-dir Examples/build --output-on-failure
+    - run: ctest --test-dir Examples/build -V
+
+
+  mac-build:
+    needs: mac
+    runs-on: macos-latest
+    timeout-minutes: 30
+    env:
+      HOMEBREW_NO_INSTALL_CLEANUP: 1
+      FC: gfortran-11
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: install libs
+      run: brew install hdf5
+
+    - run: cmake --preset build -B build --install-prefix=${HOME}
+    - run: cmake --build build
+    - run: ctest --test-dir build --preset default
+    - run: cmake --install build
+
+    - name: configure examples
+      run: cmake -S Examples -B Examples/build -Dnc4fortran_ROOT=${HOME}
+    - name: build examples
+      run: cmake --build Examples/build --parallel
+    - name: Test examples
+      run: ctest --test-dir Examples/build -V
diff --git a/cmake/netcdf.cmake b/cmake/netcdf.cmake
index 15b2760..3eb9f4b 100644
--- a/cmake/netcdf.cmake
+++ b/cmake/netcdf.cmake
@@ -100,3 +100,10 @@ add_library(NetCDF::NetCDF_Fortran INTERFACE IMPORTED GLOBAL)
 target_include_directories(NetCDF::NetCDF_Fortran INTERFACE "${NetCDF_INCLUDE_DIRS}")
 target_link_libraries(NetCDF::NetCDF_Fortran INTERFACE "${NetCDF_Fortran_LIBRARIES}")
 add_dependencies(NetCDF::NetCDF_Fortran NETCDF_FORTRAN)
+
+# --- dynamic shared library
+
+if(UNIX)
+  set(CMAKE_INSTALL_NAME_DIR ${CMAKE_INSTALL_PREFIX}/lib)
+  set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
+endif()