4 files changed, 33 insertions, 29 deletions

diff --git a/src/libstore/builtins/buildenv.cc b/src/libstore/builtins/buildenv.cc
index 6f6ad57cb..47458a388 100644
--- a/src/libstore/builtins/buildenv.cc
+++ b/src/libstore/builtins/buildenv.cc
@@ -93,8 +93,9 @@ static void createLinks(State & state, const Path & srcDir, const Path & dstDir,
                     auto prevPriority = state.priorities[dstFile];
                     if (prevPriority == priority)
                         throw Error(
-                                "packages '%1%' and '%2%' have the same priority %3%; "
+                                "files '%1%' and '%2%' have the same priority %3%; "
                                 "use 'nix-env --set-flag priority NUMBER INSTALLED_PKGNAME' "
+                                "or type 'nix profile install --help' if using 'nix profile' to find out how"
                                 "to change the priority of one of the conflicting packages"
                                 " (0 being the highest priority)",
                                 srcFile, readLink(dstFile), priority);
diff --git a/src/libstore/http-binary-cache-store.cc b/src/libstore/http-binary-cache-store.cc
index 3cb5efdbf..73bcd6e81 100644
--- a/src/libstore/http-binary-cache-store.cc
+++ b/src/libstore/http-binary-cache-store.cc
@@ -161,7 +161,12 @@ protected:
     void getFile(const std::string & path,
         Callback<std::optional<std::string>> callback) noexcept override
     {
-        checkEnabled();
+        try {
+            checkEnabled();
+        } catch (...) {
+            callback.rethrow();
+            return;
+        }
 
         auto request(makeRequest(path));
 
diff --git a/src/libstore/local-binary-cache-store.cc b/src/libstore/local-binary-cache-store.cc
index f754770f9..a3c3e4806 100644
--- a/src/libstore/local-binary-cache-store.cc
+++ b/src/libstore/local-binary-cache-store.cc
@@ -107,7 +107,7 @@ bool LocalBinaryCacheStore::fileExists(const std::string & path)
 
 std::set<std::string> LocalBinaryCacheStore::uriSchemes()
 {
-    if (getEnv("_NIX_FORCE_HTTP_BINARY_CACHE_STORE") == "1")
+    if (getEnv("_NIX_FORCE_HTTP") == "1")
         return {};
     else
         return {"file"};
diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
index 14aeba75c..bc36aef5d 100644
--- a/src/libstore/remote-store.cc
+++ b/src/libstore/remote-store.cc
@@ -718,36 +718,34 @@ void RemoteStore::registerDrvOutput(const Realisation & info)
 void RemoteStore::queryRealisationUncached(const DrvOutput & id,
     Callback<std::shared_ptr<const Realisation>> callback) noexcept
 {
-    auto conn(getConnection());
+    try {
+        auto conn(getConnection());
 
-    if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 27) {
-        warn("the daemon is too old to support content-addressed derivations, please upgrade it to 2.4");
-        try {
-            callback(nullptr);
-        } catch (...) { return callback.rethrow(); }
-    }
+        if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 27) {
+            warn("the daemon is too old to support content-addressed derivations, please upgrade it to 2.4");
+            return callback(nullptr);
+        }
 
-    conn->to << wopQueryRealisation;
-    conn->to << id.to_string();
-    conn.processStderr();
+        conn->to << wopQueryRealisation;
+        conn->to << id.to_string();
+        conn.processStderr();
 
-    auto real = [&]() -> std::shared_ptr<const Realisation> {
-        if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 31) {
-            auto outPaths = worker_proto::read(
-                *this, conn->from, Phantom<std::set<StorePath>> {});
-            if (outPaths.empty())
-                return nullptr;
-            return std::make_shared<const Realisation>(Realisation { .id = id, .outPath = *outPaths.begin() });
-        } else {
-            auto realisations = worker_proto::read(
-                *this, conn->from, Phantom<std::set<Realisation>> {});
-            if (realisations.empty())
-                return nullptr;
-            return std::make_shared<const Realisation>(*realisations.begin());
-        }
-    }();
+        auto real = [&]() -> std::shared_ptr<const Realisation> {
+            if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 31) {
+                auto outPaths = worker_proto::read(
+                    *this, conn->from, Phantom<std::set<StorePath>> {});
+                if (outPaths.empty())
+                    return nullptr;
+                return std::make_shared<const Realisation>(Realisation { .id = id, .outPath = *outPaths.begin() });
+            } else {
+                auto realisations = worker_proto::read(
+                    *this, conn->from, Phantom<std::set<Realisation>> {});
+                if (realisations.empty())
+                    return nullptr;
+                return std::make_shared<const Realisation>(*realisations.begin());
+            }
+        }();
 
-    try {
         callback(std::shared_ptr<const Realisation>(real));
     } catch (...) { return callback.rethrow(); }
 }