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-rw-r--r--src/libexpr/flake/lockfile.hh3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/libexpr/flake/lockfile.hh b/src/libexpr/flake/lockfile.hh
index 6512509c5..4616a77f6 100644
--- a/src/libexpr/flake/lockfile.hh
+++ b/src/libexpr/flake/lockfile.hh
@@ -67,6 +67,9 @@ struct LockFile
std::optional<FlakeRef> isUnlocked() const;
bool operator ==(const LockFile & other) const;
+ // Needed for old gcc versions that don't syntethise it (like gcc 8.2.2
+ // that is still the default on aarch64-linux)
+ bool operator !=(const LockFile & other) const;
std::shared_ptr<Node> findInput(const InputPath & path);