diff --git a/CMakeLists.txt b/CMakeLists.txt
index 16163ab..f8bb6b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -128,7 +128,7 @@ SET(STUB_INCLUDE_DIRS ${STUB_INCLUDE_DIRS} ${PYTHON_INCLUDE_DIRS})
 MESSAGE(STATUS "Finding and including submodules.")
 
 # Find Niels Lohmann's 'JSON for Modern C++' package
-FIND_PACKAGE(nlohmann_json REQUIRED)
+#FIND_PACKAGE(nlohmann_json REQUIRED)
 
 # The line below does not work!
 # For unknown reasons, CMake does not find the include directories
diff --git a/README.md b/README.md
index 1147506..28936c8 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,11 @@ using constant overall stage separation factors while Ref 2 gives a new
 physically founded approach to calculating said separation factors.
 
 ## GprReactor
+:rotating_light: Please note that this module does not work at the moment.
+I do not manage to correctly include the JSON dependency in the build system and
+will have to investigate this further or even remove this package entirely.
+For updates see [issue #6](https://github.com/Nuclear-Verification-and-Disarmament/miso_enrichment/issues/6).
+
 ### Requirements
 This facility needs Niels Lohmann's [JSON for Modern C++](https://json.nlohmann.me/)
 library. It can be downloaded from his [GitHub repository](https://github.com/nlohmann/json)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 1035e03..e5588bd 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -4,7 +4,7 @@ USE_CYCLUS("misoenrichment" "enrichment_calculator")
 USE_CYCLUS("misoenrichment" "miso_helper")
 USE_CYCLUS("misoenrichment" "flexible_input")
 
-USE_CYCLUS("misoenrichment" "gpr_reactor")
+#USE_CYCLUS("misoenrichment" "gpr_reactor")
 
 INSTALL_CYCLUS_MODULE("misoenrichment" "./")