diff --git a/flake.nix b/flake.nix
index 307a879bb..b3a7ea535 100644
--- a/flake.nix
+++ b/flake.nix
@@ -71,7 +71,7 @@
             bzip2 xz brotli editline
             openssl pkgconfig sqlite boehmgc
             boost
-            nlohmann_json
+            (nlohmann_json.override { multipleHeaders = true; })
 
             # Tests
             git