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-rw-r--r--third_party/nix/src/libexpr/get-drvs.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/third_party/nix/src/libexpr/get-drvs.hh b/third_party/nix/src/libexpr/get-drvs.hh
index bb20c32c0b44..30645123ea0d 100644
--- a/third_party/nix/src/libexpr/get-drvs.hh
+++ b/third_party/nix/src/libexpr/get-drvs.hh
@@ -7,7 +7,7 @@
 
 namespace nix {
 
-struct DrvInfo {
+struct DrvInfo : public gc {
  public:
   typedef std::map<std::string, Path> Outputs;