repl.cc: Check for HAVE_BOEHMGC

Fixes #3906.
NixOS · Aug 6, 2020 · 59067f0 · 59067f0
1 parent 3321b2b
commit 59067f0
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/nix/repl.cc b/src/nix/repl.cc
@@ -33,12 +33,17 @@ extern "C" {
 #include "command.hh"
 #include "finally.hh"
 
+#if HAVE_BOEHMGC
 #define GC_INCLUDE_NEW
 #include <gc/gc_cpp.h>
+#endif
 
 namespace nix {
 
-struct NixRepl : gc
+struct NixRepl
+    #if HAVE_BOEHMGC
+    : gc
+    #endif
 {
     string curDir;
     std::unique_ptr<EvalState> state;