Remove std::string alias (for real this time)

Also use std::string_view in a few more places.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstore/profiles.hh b/src/libstore/profiles.hh
index d100c970c..408ca039c 100644
--- a/src/libstore/profiles.hh
+++ b/src/libstore/profiles.hh
@@ -42,7 +42,7 @@ void deleteOldGenerations(const Path & profile, bool dryRun);
 
 void deleteGenerationsOlderThan(const Path & profile, time_t t, bool dryRun);
 
-void deleteGenerationsOlderThan(const Path & profile, const string & timeSpec, bool dryRun);
+void deleteGenerationsOlderThan(const Path & profile, std::string_view timeSpec, bool dryRun);
 
 void switchLink(Path link, Path target);
 
@@ -66,7 +66,7 @@ void lockProfile(PathLocks & lock, const Path & profile);
    generally cheap, since the build results are still in the Nix
    store.  Most of the time, only the user environment has to be
    rebuilt. */
-string optimisticLockProfile(const Path & profile);
+std::string optimisticLockProfile(const Path & profile);
 
 /* Resolve ~/.nix-profile. If ~/.nix-profile doesn't exist yet, create
    it. */