diff --git a/CMakeLists.txt b/CMakeLists.txt
index d723887..4c0a499 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,6 +6,8 @@ project(
         C
 )
 
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
 add_library(
     ${PROJECT_NAME}
     json.c
diff --git a/flake.nix b/flake.nix
index a614e1f..9a9973a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,6 +27,7 @@
         clang-tools
         ctags
         valgrind
+        cdecl
       ];
     in
     {