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-rw-r--r--src/libstore/build.cc2
-rw-r--r--src/libstore/local-fs-store.cc4
-rw-r--r--src/libstore/local-store.cc2
-rw-r--r--src/libstore/store-api.hh2
-rw-r--r--src/nix-store/nix-store.cc8
5 files changed, 13 insertions, 5 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 10ae574f9e49..08a7fd91dda7 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -2910,7 +2910,7 @@ Path DerivationGoal::openLogFile()
     string baseName = baseNameOf(drvPath);
 
     /* Create a log file. */
-    Path dir = (format("%1%/%2%/%3%/") % settings.nixLogDir % drvsLogDir % string(baseName, 0, 2)).str();
+    Path dir = (format("%1%/%2%/%3%/") % worker.store.logDir % drvsLogDir % string(baseName, 0, 2)).str();
     createDirs(dir);
 
     Path logFileName = (format("%1%/%2%%3%")
diff --git a/src/libstore/local-fs-store.cc b/src/libstore/local-fs-store.cc
index b1b9dc29e40d..c6ed8f746c69 100644
--- a/src/libstore/local-fs-store.cc
+++ b/src/libstore/local-fs-store.cc
@@ -7,7 +7,9 @@ namespace nix {
 
 LocalFSStore::LocalFSStore(const Params & params)
     : Store(params)
-    , stateDir(get(params, "state", settings.nixStateDir))
+    , rootDir(get(params, "root"))
+    , stateDir(canonPath(get(params, "state", rootDir != "" ? rootDir + "/nix/var/nix" : settings.nixStateDir)))
+    , logDir(canonPath(get(params, "log", rootDir != "" ? rootDir + "/nix/var/log/nix" : settings.nixLogDir)))
 {
 }
 
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index f9610912307d..bc03c5374099 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -38,7 +38,7 @@ namespace nix {
 
 LocalStore::LocalStore(const Params & params)
     : LocalFSStore(params)
-    , realStoreDir(get(params, "real", storeDir))
+    , realStoreDir(get(params, "real", rootDir != "" ? rootDir + "/nix/store" : storeDir))
     , dbDir(stateDir + "/db")
     , linksDir(realStoreDir + "/.links")
     , reservedPath(dbDir + "/reserved")
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 0b80312d6307..f80a06aaf8bb 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -491,7 +491,9 @@ protected:
 class LocalFSStore : public Store
 {
 public:
+    const Path rootDir;
     const Path stateDir;
+    const Path logDir;
 
     LocalFSStore(const Params & params);
 
diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc
index 8532101a174d..e8b56f929b13 100644
--- a/src/nix-store/nix-store.cc
+++ b/src/nix-store/nix-store.cc
@@ -483,6 +483,10 @@ static void opReadLog(Strings opFlags, Strings opArgs)
 
     RunPager pager;
 
+    // FIXME: move getting logs into Store.
+    auto store2 = std::dynamic_pointer_cast<LocalFSStore>(store);
+    if (!store2) throw Error(format("store ‘%s’ does not support reading logs") % store->getUri());
+
     for (auto & i : opArgs) {
         Path path = useDeriver(store->followLinksToStorePath(i));
 
@@ -493,8 +497,8 @@ static void opReadLog(Strings opFlags, Strings opArgs)
 
             Path logPath =
                 j == 0
-                ? (format("%1%/%2%/%3%/%4%") % settings.nixLogDir % drvsLogDir % string(baseName, 0, 2) % string(baseName, 2)).str()
-                : (format("%1%/%2%/%3%") % settings.nixLogDir % drvsLogDir % baseName).str();
+                ? (format("%1%/%2%/%3%/%4%") % store2->logDir % drvsLogDir % string(baseName, 0, 2) % string(baseName, 2)).str()
+                : (format("%1%/%2%/%3%") % store2->logDir % drvsLogDir % baseName).str();
             Path logBz2Path = logPath + ".bz2";
 
             if (pathExists(logPath)) {