diff --git a/src/libcmd/command.cc b/src/libcmd/command.cc
index e38f982d8..0fb4f5680 100644
--- a/src/libcmd/command.cc
+++ b/src/libcmd/command.cc
@@ -246,21 +246,17 @@ MixProfile::MixProfile()
     });
 }
 
-void MixProfile::updateProfile(
-    const StorePath & storePath,
-    ref<Store> store_)
+void MixProfile::updateProfile(const StorePath & storePath)
 {
     if (!profile) return;
-    auto store = store_.dynamic_pointer_cast<LocalFSStore>();
+    auto store = getDstStore().dynamic_pointer_cast<LocalFSStore>();
     if (!store) throw Error("'--profile' is not supported for this Nix store");
     auto profile2 = absPath(*profile);
     switchLink(profile2,
         createGeneration(*store, profile2, storePath));
 }
 
-void MixProfile::updateProfile(
-    const BuiltPaths & buildables,
-    ref<Store> store)
+void MixProfile::updateProfile(const BuiltPaths & buildables)
 {
     if (!profile) return;
 
@@ -282,7 +278,7 @@ void MixProfile::updateProfile(
     if (result.size() != 1)
         throw UsageError("'--profile' requires that the arguments produce a single store path, but there are %d", result.size());
 
-    updateProfile(result[0], store);
+    updateProfile(result[0]);
 }
 
 MixDefaultProfile::MixDefaultProfile()
diff --git a/src/libcmd/command.hh b/src/libcmd/command.hh
index 8ada78782..73aaab741 100644
--- a/src/libcmd/command.hh
+++ b/src/libcmd/command.hh
@@ -45,7 +45,20 @@ struct StoreCommand : virtual Command
 {
     StoreCommand();
     void run() override;
+
+    /**
+     * Return the default Nix store.
+     */
     ref<Store> getStore();
+
+    /**
+     * Return the destination Nix store.
+     */
+    virtual ref<Store> getDstStore()
+    {
+        return getStore();
+    }
+
     virtual ref<Store> createStore();
     /**
      * Main entry point, with a `Store` provided
@@ -68,7 +81,7 @@ struct CopyCommand : virtual StoreCommand
 
     ref<Store> createStore() override;
 
-    ref<Store> getDstStore();
+    ref<Store> getDstStore() override;
 };
 
 /**
@@ -301,15 +314,11 @@ struct MixProfile : virtual StoreCommand
     MixProfile();
 
     /* If 'profile' is set, make it point at 'storePath'. */
-    void updateProfile(
-        const StorePath & storePath,
-        ref<Store> store);
+    void updateProfile(const StorePath & storePath);
 
     /* If 'profile' is set, make it point at the store path produced
        by 'buildables'. */
-    void updateProfile(
-        const BuiltPaths & buildables,
-        ref<Store> store);
+    void updateProfile(const BuiltPaths & buildables);
 };
 
 struct MixDefaultProfile : MixProfile
diff --git a/src/nix/build.cc b/src/nix/build.cc
index cffbeccb6..da9132d02 100644
--- a/src/nix/build.cc
+++ b/src/nix/build.cc
@@ -161,7 +161,7 @@ struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
         BuiltPaths buildables2;
         for (auto & b : buildables)
             buildables2.push_back(b.path);
-        updateProfile(buildables2, store);
+        updateProfile(buildables2);
     }
 };
 
diff --git a/src/nix/copy.cc b/src/nix/copy.cc
index c058a7446..60a64723c 100644
--- a/src/nix/copy.cc
+++ b/src/nix/copy.cc
@@ -57,7 +57,7 @@ struct CmdCopy : virtual CopyCommand, virtual BuiltPathsCommand, MixProfile
         copyPaths(
             *srcStore, *dstStore, stuffToCopy, NoRepair, checkSigs, substitute);
 
-        updateProfile(rootPaths, dstStore);
+        updateProfile(rootPaths);
     }
 };
 
diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index ca9f6a4af..c7a733025 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -502,7 +502,7 @@ struct Common : InstallableCommand, MixProfile
 
         auto strPath = store->printStorePath(shellOutPath);
 
-        updateProfile(shellOutPath, store);
+        updateProfile(shellOutPath);
 
         debug("reading environment file '%s'", strPath);
 
diff --git a/src/nix/profile.cc b/src/nix/profile.cc
index ae1f3e6e9..324fd6330 100644
--- a/src/nix/profile.cc
+++ b/src/nix/profile.cc
@@ -424,7 +424,7 @@ struct CmdProfileInstall : InstallablesCommand, MixDefaultProfile
         }
 
         try {
-            updateProfile(manifest.build(store), store);
+            updateProfile(manifest.build(store));
         } catch (BuildEnvFileConflictError & conflictError) {
             // FIXME use C++20 std::ranges once macOS has it
             //       See https://github.com/NixOS/nix/compare/3efa476c5439f8f6c1968a6ba20a31d1239c2f04..1fe5d172ece51a619e879c4b86f603d9495cc102
@@ -669,7 +669,7 @@ struct CmdProfileRemove : virtual EvalCommand, MixDefaultProfile, MixProfileElem
             removedCount,
             newManifest.elements.size());
 
-        updateProfile(newManifest.build(store), store);
+        updateProfile(newManifest.build(store));
     }
 };
 
@@ -779,7 +779,7 @@ struct CmdProfileUpgrade : virtual SourceExprCommand, MixDefaultProfile, MixProf
                 builtPaths.find(&*installable)->second.first);
         }
 
-        updateProfile(manifest.build(store), store);
+        updateProfile(manifest.build(store));
     }
 };