1 files changed, 5 insertions, 3 deletions
diff --git a/src/libutil/compression.hh b/src/libutil/compression.hh
index e3e6f5a99303..f7a3e3fbd32e 100644
--- a/src/libutil/compression.hh
+++ b/src/libutil/compression.hh
@@ -8,16 +8,18 @@
 
 namespace nix {
 
-ref<std::string> compress(const std::string & method, const std::string & in);
-
 ref<std::string> decompress(const std::string & method, const std::string & in);
 
+void decompress(const std::string & method, Source & source, Sink & sink);
+
+ref<std::string> compress(const std::string & method, const std::string & in, const bool parallel = false);
+
 struct CompressionSink : BufferedSink
 {
     virtual void finish() = 0;
 };
 
-ref<CompressionSink> makeCompressionSink(const std::string & method, Sink & nextSink);
+ref<CompressionSink> makeCompressionSink(const std::string & method, Sink & nextSink, const bool parallel = false);
 
 MakeError(UnknownCompressionMethod, Error);