diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 66bbf5d1396a60d4df4935dc2237a921e7e609ab..d7f39297d068f53081cd9ea8caf9180a81794457 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,10 +8,10 @@ stages:
 variables:
   # Build config
   BUILD_TYPE: Release
-  BUILD_PROCESSES: "" # Empty string: builds all processes
+  BUILD_PROCESSES: "ON" # or OFF or ;-separated list of processes
   BUILD_TESTS: "true"
   BUILD_CTEST: "true"
-  CPU_TARGET: ivybridge # envinf2 has oldest cpu
+  CPU_TARGET: ivybridge # envinf1 has oldest cpu
 
 workflow:
   rules:
diff --git a/Applications/ApplicationsLib/CMakeLists.txt b/Applications/ApplicationsLib/CMakeLists.txt
index a915de8466253ebf902e049aa335e829f5cdac60..05b380e432004e765c4ae7c0f398c94ec7a24076 100644
--- a/Applications/ApplicationsLib/CMakeLists.txt
+++ b/Applications/ApplicationsLib/CMakeLists.txt
@@ -8,19 +8,14 @@ ogs_add_library(ApplicationsLib ${LIB_SOURCES})
 target_link_libraries(
     ApplicationsLib
     PUBLIC BaseLib GeoLib NumLib
-    PRIVATE CMakeInfoLib
-            MathLib
-            MeshLib
-            MeshGeoToolsLib
+    PRIVATE CMakeInfoLib MathLib MeshLib MeshGeoToolsLib
             $<$<BOOL:${OGS_USE_PYTHON}>:pybind11::pybind11>
             $<$<BOOL:${OGS_USE_PETSC}>:petsc>
 )
 
 if(OGS_BUILD_CLI OR OGS_BUILD_UTILS OR OGS_BUILD_TESTING)
     target_link_libraries(
-        ApplicationsLib
-        PUBLIC Processes
-        PRIVATE ParameterLib ProcessLib
+        ApplicationsLib PUBLIC Processes PRIVATE ParameterLib ProcessLib
     )
 elseif(OGS_BUILD_GUI)
     target_link_libraries(ApplicationsLib PRIVATE nlohmann_json::nlohmann_json)
@@ -36,12 +31,10 @@ target_compile_definitions(
 )
 
 # Set cpp definitions if the cmake option is enabled for the given process.
-foreach(process ${_processes_list})
-    if(OGS_BUILD_PROCESS_${process})
-        string(TOUPPER "OGS_BUILD_PROCESS_${process}" EnableProcess)
-        set_property(
-            TARGET ApplicationsLib APPEND PROPERTY COMPILE_DEFINITIONS
-                                                   ${EnableProcess}
-        )
-    endif()
+foreach(process ${_enabled_processes})
+    string(TOUPPER "OGS_BUILD_PROCESS_${process}" EnableProcess)
+    set_property(
+        TARGET ApplicationsLib APPEND PROPERTY COMPILE_DEFINITIONS
+                                               ${EnableProcess}
+    )
 endforeach()
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 573524796c9f6e2f8efa9cdd1d2818b848139b7a..4f3e337f2c98ad994743452e0e38b33436f2f392 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -214,9 +214,7 @@ add_subdirectory(MeshLib)
 add_subdirectory(MeshGeoToolsLib)
 add_subdirectory(NumLib)
 
-if(OGS_BUILD_PROCESS_ComponentTransport
-   OR OGS_BUILD_PROCESS_RichardsComponentTransport
-)
+if(_build_chemistry_lib)
     add_subdirectory(ChemistryLib)
 endif()
 
@@ -274,3 +272,5 @@ include(scripts/cmake/MarkVariablesAdvanced.cmake)
 unset(PRE_INSTALL_RUN CACHE)
 
 include(Features)
+
+printEnabledProcesses()
diff --git a/ProcessLib/CMakeLists.txt b/ProcessLib/CMakeLists.txt
index 2e4ae212faa09f268ca0e696b56442ddaaf28a76..97de8fc0a26216a66aaf8c0e6f178c5cb9c7352d 100644
--- a/ProcessLib/CMakeLists.txt
+++ b/ProcessLib/CMakeLists.txt
@@ -1,14 +1,10 @@
 # Collect the process libraries in interface library
 add_library(Processes INTERFACE)
 
-foreach(process ${_processes_list})
-    if(OGS_BUILD_PROCESS_${process})
-        add_subdirectory(${process})
-        target_link_libraries(Processes INTERFACE ${process})
-        set_target_properties(
-            ${process} PROPERTIES JOB_POOL_COMPILE heavy_tasks
-        )
-    endif()
+foreach(process ${_enabled_processes})
+    add_subdirectory(${process})
+    target_link_libraries(Processes INTERFACE ${process})
+    set_target_properties(${process} PROPERTIES JOB_POOL_COMPILE heavy_tasks)
 endforeach()
 
 get_source_files(SOURCES)
diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index 9a285c56644dfcf16fd0333084bdaa8ad582a627..15f5b7fcf7419848315b7cc342d16fc636a24d58 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -47,7 +47,7 @@ if(OGS_BUILD_SWMM)
     append_source_files(TEST_SOURCES FileIO_SWMM)
 endif()
 
-if(OGS_BUILD_PROCESS_ComponentTransport)
+if(TARGET ComponentTransport)
     append_source_files(TEST_SOURCES ProcessLib/ComponentTransport)
 endif()
 
diff --git a/scripts/cmake/Dependencies.cmake b/scripts/cmake/Dependencies.cmake
index b4eaecfa589b0949de822217798a4f445c1e6541..f2e90a8a989421c687ba06437cf5094686301a78 100644
--- a/scripts/cmake/Dependencies.cmake
+++ b/scripts/cmake/Dependencies.cmake
@@ -99,9 +99,7 @@ if(OGS_USE_PYTHON)
     )
 endif()
 
-if(OGS_BUILD_PROCESS_ComponentTransport
-   OR OGS_BUILD_PROCESS_RichardsComponentTransport
-)
+if(_build_chemistry_lib)
     CPMAddPackage(
         NAME iphreeqc
         GITHUB_REPOSITORY ufz/iphreeqc
diff --git a/scripts/cmake/ProcessesSetup.cmake b/scripts/cmake/ProcessesSetup.cmake
index 21f9407d5625c5f90807400fa75d1e2265970f87..e0d4df5a2420f1f90728f8d51b71b456d554d6a9 100644
--- a/scripts/cmake/ProcessesSetup.cmake
+++ b/scripts/cmake/ProcessesSetup.cmake
@@ -28,25 +28,33 @@ set(_processes_list
     TwoPhaseFlowWithPrho
 )
 
-# Add a cmake option for each process.
 foreach(process ${_processes_list})
-    option(OGS_BUILD_PROCESS_${process} "Build the ${process} process." ON)
+    option(OGS_BUILD_PROCESS_${process} "Build process ${process}" ON)
+    if(OGS_BUILD_PROCESS_${process})
+        list(APPEND _enabled_processes ${process})
+    endif()
 endforeach()
 
-set(OGS_BUILD_PROCESSES ""
-    CACHE STRING "Semicolon-separated list of processes to build"
-)
 if(NOT OGS_BUILD_CLI)
-    set(OGS_BUILD_PROCESSES OFF "" CACHE STRING "" FORCE)
+    set(OGS_BUILD_PROCESSES OFF)
     message(
         STATUS
             "ATTENTION: OGS_BUILD_CLI=OFF -> OGS_BUILD_PROCESSES is set to OFF too.\n"
             "   If cli is switched on again, remember to switch processes back to on \n"
-            "   too with -DOGS_BUILD_PROCESSES=\"\"!"
+            "   too with -DOGS_BUILD_PROCESSES=ON!"
     )
 endif()
-if(NOT "${OGS_BUILD_PROCESSES}" STREQUAL "")
-    if(${OGS_BUILD_PROCESSES})
+
+if(DEFINED CACHE{OGS_BUILD_PROCESSES})
+    if("${OGS_BUILD_PROCESSES}" STREQUAL "ON" OR "${OGS_BUILD_PROCESSES}"
+                                                 STREQUAL "OFF"
+    )
+        if(OGS_BUILD_PROCESSES)
+            set(_enabled_processes ${_processes_list})
+        else()
+            unset(_enabled_processes)
+        endif()
+    else()
         foreach(process ${OGS_BUILD_PROCESSES})
             if(NOT "${process}" IN_LIST _processes_list)
                 message(
@@ -56,16 +64,39 @@ if(NOT "${OGS_BUILD_PROCESSES}" STREQUAL "")
                 )
             endif()
         endforeach()
-        message(STATUS "Enabled processes:")
-    else()
-        message(STATUS "All processes disabled.")
+        set(_enabled_processes ${OGS_BUILD_PROCESSES})
     endif()
     foreach(process ${_processes_list})
-        if("${process}" IN_LIST OGS_BUILD_PROCESSES)
+        if(${process} IN_LIST _enabled_processes)
             set(OGS_BUILD_PROCESS_${process} ON CACHE BOOL "" FORCE)
-            message(STATUS "  ${process}")
         else()
             set(OGS_BUILD_PROCESS_${process} OFF CACHE BOOL "" FORCE)
         endif()
     endforeach()
+    unset(OGS_BUILD_PROCESSES CACHE)
 endif()
+
+if("RichardsComponentTransport" IN_LIST _enabled_processes
+   OR "ComponentTransport" IN_LIST _enabled_processes
+)
+    set(_build_chemistry_lib ON)
+endif()
+
+# Print summary of enabled processes.
+function(printEnabledProcesses)
+    list(LENGTH _enabled_processes num_enabled_processes)
+    list(LENGTH _processes_list num_processes_list)
+    if(${num_enabled_processes} EQUAL 0)
+        message(STATUS "All processes have been disabled!\n")
+        return()
+    endif()
+    if(${num_processes_list} EQUAL ${num_enabled_processes})
+        message(STATUS "All processes have been enabled.\n")
+        return()
+    endif()
+    message(STATUS "The following processes have been enabled:\n")
+    foreach(process ${_enabled_processes})
+        message(" * ${process}")
+    endforeach()
+    message("")
+endfunction()
diff --git a/web/content/docs/devguide/advanced/configuration-options.md b/web/content/docs/devguide/advanced/configuration-options.md
index 019c686f1259fe486a0f6be099d72339a380b7c1..6c3a30243bfc11bd4fe5049a88e2547ca8088f12 100644
--- a/web/content/docs/devguide/advanced/configuration-options.md
+++ b/web/content/docs/devguide/advanced/configuration-options.md
@@ -17,13 +17,13 @@ Some of these options are enabled by default ("*Defaults* to *ON*") otherwise th
 
 CMake switches to enable / disable parts of OGS.
 
-- `OGS_BUILD_CLI` - Builds the simulator. *Defaults* to *ON*. If set to *OFF* all processes are also disabled.
+- `OGS_BUILD_CLI` - Builds the simulator. *Defaults* to *ON*. If set to *OFF* all processes are also disabled (see variable `OGS_BUILD_PROCESSES` below).
 - `OGS_BUILD_GUI` - Builds the Data Explorer. *Defaults* to *OFF*.
 - `OGS_BUILD_TESTING` - Builds the test executables. *Defaults* to *ON*.
 - `OGS_BUILD_UTILS` - Builds several utilities.
 - `OGS_BUILD_PROCESS_X` - For enabling/disabling compilation of process `X`.
-  Run the CMake-Gui to see a list of processes.
-- `OGS_BUILD_PROCESSES` - A `;`-separated list specifying processes to build. *Defaults* to an *empty string*. This will alter the `OGS_BUILD_PROCESS_X`-options. For e.g. building just the two processes `HT` and `LIE`: `-DOGS_BUILD_PROCESSES="HT;LIE"`. Setting this variable back to an empty string **does not reset** the `OGS_BUILD_PROCESS_X`-options. You can also set it to *OFF* to disable all processes.
+  Run the CMake-Gui / ccmake to see a list of processes.
+- `OGS_BUILD_PROCESSES` - A `;`-separated list specifying processes to build, e.g. `-DOGS_BUILD_PROCESSES="HT;LIE"`. Can be set to *ON* which means all processes are built or can be set to *OFF* to disable all processes. **Attention:** Setting this variable overrides individual `OGS_BUILD_PROCESS_X`-variables! This option is mainly used for CI and automation. Also the value of this variable is not cached.
 
 ### Debugging