diff --git a/src/libstore/profiles.cc b/src/libstore/profiles.cc
index 6862b42f0..e91dd781e 100644
--- a/src/libstore/profiles.cc
+++ b/src/libstore/profiles.cc
@@ -72,7 +72,7 @@ static void makeName(const Path & profile, GenerationNumber num,
 }
 
 
-Path createGeneration(ref<LocalFSStore> store, Path profile, Path outPath)
+Path createGeneration(ref<LocalFSStore> store, Path profile, StorePath outPath)
 {
     /* The new generation number should be higher than old the
        previous ones. */
@@ -82,7 +82,7 @@ Path createGeneration(ref<LocalFSStore> store, Path profile, Path outPath)
     if (gens.size() > 0) {
         Generation last = gens.back();
 
-        if (readLink(last.path) == outPath) {
+        if (readLink(last.path) == store->printStorePath(outPath)) {
             /* We only create a new generation symlink if it differs
                from the last one.
 
@@ -105,7 +105,7 @@ Path createGeneration(ref<LocalFSStore> store, Path profile, Path outPath)
        user environment etc. we've just built. */
     Path generation;
     makeName(profile, num + 1, generation);
-    store->addPermRoot(store->parseStorePath(outPath), generation, false, true);
+    store->addPermRoot(outPath, generation, false, true);
 
     return generation;
 }
diff --git a/src/libstore/profiles.hh b/src/libstore/profiles.hh
index abe507f0e..be55a65d4 100644
--- a/src/libstore/profiles.hh
+++ b/src/libstore/profiles.hh
@@ -8,6 +8,8 @@
 
 namespace nix {
 
+class StorePath;
+
 
 typedef unsigned int GenerationNumber;
 
@@ -28,7 +30,7 @@ std::pair<Generations, std::optional<GenerationNumber>> findGenerations(Path pro
 
 class LocalFSStore;
 
-Path createGeneration(ref<LocalFSStore> store, Path profile, Path outPath);
+Path createGeneration(ref<LocalFSStore> store, Path profile, StorePath outPath);
 
 void deleteGeneration(const Path & profile, GenerationNumber gen);
 
diff --git a/src/nix-env/nix-env.cc b/src/nix-env/nix-env.cc
index ddd036070..e5a433ac0 100644
--- a/src/nix-env/nix-env.cc
+++ b/src/nix-env/nix-env.cc
@@ -708,7 +708,9 @@ static void opSet(Globals & globals, Strings opFlags, Strings opArgs)
     }
 
     debug(format("switching to new user environment"));
-    Path generation = createGeneration(ref<LocalFSStore>(store2), globals.profile, drv.queryOutPath());
+    Path generation = createGeneration(
+        ref<LocalFSStore>(store2), globals.profile,
+        store2->parseStorePath(drv.queryOutPath()));
     switchLink(globals.profile, generation);
 }
 
diff --git a/src/nix-env/user-env.cc b/src/nix-env/user-env.cc
index 8e7f09e12..8c6c8af05 100644
--- a/src/nix-env/user-env.cc
+++ b/src/nix-env/user-env.cc
@@ -151,7 +151,8 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
         }
 
         debug(format("switching to new user environment"));
-        Path generation = createGeneration(ref<LocalFSStore>(store2), profile, topLevelOut);
+        Path generation = createGeneration(ref<LocalFSStore>(store2), profile,
+            store2->parseStorePath(topLevelOut));
         switchLink(profile, generation);
     }
 
diff --git a/src/nix/command.cc b/src/nix/command.cc
index 2f1fbded1..efac230bd 100644
--- a/src/nix/command.cc
+++ b/src/nix/command.cc
@@ -134,7 +134,7 @@ void MixProfile::updateProfile(const StorePath & storePath)
     switchLink(profile2,
         createGeneration(
             ref<LocalFSStore>(store),
-            profile2, store->printStorePath(storePath)));
+            profile2, storePath));
 }
 
 void MixProfile::updateProfile(const Buildables & buildables)