Restore an accidentally suppressed negation

Accidentally removed in ca96f52. This caused `nix run` to systematically fail with ``` error: app program '/nix/store/…' is not in the Nix store ```
NixOS · May 18, 2021 · 59d0de6 · 59d0de6
1 parent de77d1b
commit 59d0de6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/nix/app.cc b/src/nix/app.cc
@@ -112,7 +112,7 @@ App UnresolvedApp::resolve(ref<Store> store)
 
     auto builtContext = build(store, Realise::Outputs, installableContext);
     res.program = resolveString(*store, unresolved.program, builtContext);
-    if (store->isInStore(res.program))
+    if (!store->isInStore(res.program))
         throw Error("app program '%s' is not in the Nix store", res.program);
 
     return res;