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-rw-r--r--pkgs/development/compilers/bs-platform/build-bs-platform.nix4
1 files changed, 4 insertions, 0 deletions
diff --git a/pkgs/development/compilers/bs-platform/build-bs-platform.nix b/pkgs/development/compilers/bs-platform/build-bs-platform.nix
index ed4e5ebba2f..d7d0fe0b12b 100644
--- a/pkgs/development/compilers/bs-platform/build-bs-platform.nix
+++ b/pkgs/development/compilers/bs-platform/build-bs-platform.nix
@@ -26,6 +26,10 @@ stdenv.mkDerivation rec {
   pname = "bs-platform";
 
   BS_RELEASE_BUILD = "true";
+
+  # BuckleScript's idiosyncratic build process only builds artifacts required
+  # for editor-tooling to work when this environment variable is set:
+  # https://github.com/BuckleScript/bucklescript/blob/7.2.0/scripts/install.js#L225-L227
   BS_TRAVIS_CI = "1";
 
   buildInputs = [ nodejs python3 custom-ninja ];