spidermonkey_91: fix cross compilation

The configurePlatforms mkDerivation parameter needs to be an empty list
to avoid bogus defaults from breaking cross compilation.

Document the parameter to prevent it from being cleaned up.

1 files changed, 2 insertions, 0 deletions

diff --git a/pkgs/development/interpreters/spidermonkey/78.nix b/pkgs/development/interpreters/spidermonkey/78.nix
index cd745c5ba9e03..b4ed171eb78c4 100644
--- a/pkgs/development/interpreters/spidermonkey/78.nix
+++ b/pkgs/development/interpreters/spidermonkey/78.nix
@@ -92,6 +92,8 @@ stdenv.mkDerivation rec {
     "--target=${stdenv.hostPlatform.config}"
   ];
 
+  # mkDerivation by default appends --build/--host to configureFlags when cross compiling
+  # These defaults are bogus for Spidermonkey - avoid passing them by providing an empty list
   configurePlatforms = [ ];
 
   depsBuildBuild = [ buildPackages.stdenv.cc ];