diff --git a/src/plugins/docker/dockerdevice.cpp b/src/plugins/docker/dockerdevice.cpp
index 8561764688c..1ebe044a913 100644
--- a/src/plugins/docker/dockerdevice.cpp
+++ b/src/plugins/docker/dockerdevice.cpp
@@ -540,6 +540,9 @@ bool isValidMountInfo(const DockerDevicePrivate::TemporaryMountInfo &mi)
     if (!mi.path.isAbsolutePath() || !mi.containerPath.isAbsolutePath())
         return false;
 
+    if (mi.containerPath.isRootPath())
+        return false;
+
     if (!mi.path.exists())
         return false;
 
diff --git a/src/plugins/projectexplorer/buildaspects.cpp b/src/plugins/projectexplorer/buildaspects.cpp
index 02cc62b69e2..919bd837e6f 100644
--- a/src/plugins/projectexplorer/buildaspects.cpp
+++ b/src/plugins/projectexplorer/buildaspects.cpp
@@ -5,7 +5,11 @@
 
 #include "buildconfiguration.h"
 #include "buildpropertiessettings.h"
+#include "devicesupport/idevice.h"
+#include "kitinformation.h"
+#include "projectexplorerconstants.h"
 #include "projectexplorer.h"
+#include "target.h"
 
 #include <coreplugin/fileutils.h>
 
@@ -24,13 +28,17 @@ namespace ProjectExplorer {
 class BuildDirectoryAspect::Private
 {
 public:
+    Private(Target *target) : target(target) {}
+
     FilePath sourceDir;
+    Target * const target;
     FilePath savedShadowBuildDir;
     QString problem;
     QPointer<InfoLabel> problemLabel;
 };
 
-BuildDirectoryAspect::BuildDirectoryAspect(const BuildConfiguration *bc) : d(new Private)
+BuildDirectoryAspect::BuildDirectoryAspect(const BuildConfiguration *bc)
+    : d(new Private(bc->target()))
 {
     setSettingsKey("ProjectExplorer.BuildConfiguration.BuildDirectory");
     setLabelText(tr("Build directory:"));
@@ -40,6 +48,16 @@ BuildDirectoryAspect::BuildDirectoryAspect(const BuildConfiguration *bc) : d(new
         const FilePath fixedDir = fixupDir(FilePath::fromUserInput(edit->text()));
         if (!fixedDir.isEmpty())
             edit->setText(fixedDir.toUserOutput());
+
+        const FilePath newPath = FilePath::fromUserInput(edit->text());
+        const auto buildDevice = DeviceKitAspect::device(d->target->kit());
+
+        if (buildDevice && buildDevice->type() != ProjectExplorer::Constants::DESKTOP_DEVICE_TYPE
+            && !buildDevice->rootPath().ensureReachable(newPath)) {
+            *error = tr("The build directory is not reachable from the build device.");
+            return false;
+        }
+
         return pathChooser() ? pathChooser()->defaultValidationFunction()(edit, error) : true;
     });
     setOpenTerminalHandler([this, bc] {
@@ -109,6 +127,12 @@ void BuildDirectoryAspect::addToLayout(LayoutBuilder &builder)
             }
         });
     }
+
+    const auto buildDevice = DeviceKitAspect::device(d->target->kit());
+    if (buildDevice && buildDevice->type() != ProjectExplorer::Constants::DESKTOP_DEVICE_TYPE)
+        pathChooser()->setAllowPathFromDevice(true);
+    else
+        pathChooser()->setAllowPathFromDevice(false);
 }
 
 FilePath BuildDirectoryAspect::fixupDir(const FilePath &dir)