diff --git a/lix/libstore/nar-info.cc b/lix/libstore/nar-info.cc
index 21166d56d..00da9ce61 100644
--- a/lix/libstore/nar-info.cc
+++ b/lix/libstore/nar-info.cc
@@ -4,7 +4,7 @@
 
 namespace nix {
 
-NarInfo::NarInfo(const Store & store, const std::string & s, const std::string & whence)
+NarInfo::NarInfo(const Store & store, const std::string_view & s, const std::string_view & whence)
     : ValidPathInfo(StorePath(StorePath::dummy), Hash(Hash::dummy)) // FIXME: hack
 {
     unsigned line = 1;
diff --git a/lix/libstore/nar-info.hh b/lix/libstore/nar-info.hh
index 5f0819461..431a0c226 100644
--- a/lix/libstore/nar-info.hh
+++ b/lix/libstore/nar-info.hh
@@ -22,7 +22,7 @@ struct NarInfo : ValidPathInfo
     { }
     NarInfo(StorePath && path, Hash narHash) : ValidPathInfo(std::move(path), narHash) { }
     NarInfo(const ValidPathInfo & info) : ValidPathInfo(info) { }
-    NarInfo(const Store & store, const std::string & s, const std::string & whence);
+    NarInfo(const Store & store, const std::string_view & s, const std::string_view & whence);
 
     std::string to_string(const Store & store) const;
 };