conditinally import simplifile

src/squall.gleam

···
 import gleam/list
 import gleam/result
 import gleam/string
-import simplifile
 import squall/adapter.{type HttpAdapter}
+
+@target(erlang)
+import simplifile
 import squall/internal/codegen
 import squall/internal/discovery
 import squall/internal/error

src/squall/internal/discovery.gleam

···
 import gleam/list
 import gleam/result
 import gleam/string
-import simplifile
 import squall/internal/error.{type Error}
+
+@target(erlang)
+import simplifile
 
 pub type GraphQLFile {
   GraphQLFile(path: String, operation_name: String, content: String)