diff --git a/Source/cmakemain.cxx b/Source/cmakemain.cxx
index cc3073251..c94ffec06 100644
--- a/Source/cmakemain.cxx
+++ b/Source/cmakemain.cxx
@@ -420,7 +420,7 @@ static int do_build(int ac, char const* const* av)
       switch (doing)
         {
         case DoingDir:
-          dir = av[i];
+          dir = cmSystemTools::CollapseFullPath(av[i]);
           doing = DoingNone;
           break;
         case DoingTarget:
diff --git a/Tests/RunCMake/CommandLine/BuildDir.cmake b/Tests/RunCMake/CommandLine/BuildDir.cmake
new file mode 100644
index 000000000..30030a783
--- /dev/null
+++ b/Tests/RunCMake/CommandLine/BuildDir.cmake
@@ -0,0 +1 @@
+add_subdirectory(BuildDir)
diff --git a/Tests/RunCMake/CommandLine/BuildDir/CMakeLists.txt b/Tests/RunCMake/CommandLine/BuildDir/CMakeLists.txt
new file mode 100644
index 000000000..20df108ef
--- /dev/null
+++ b/Tests/RunCMake/CommandLine/BuildDir/CMakeLists.txt
@@ -0,0 +1,5 @@
+add_custom_command(
+  OUTPUT output.txt
+  COMMAND ${CMAKE_COMMAND} -E echo CustomCommand > output.txt
+  )
+add_custom_target(CustomTarget ALL DEPENDS output.txt)
diff --git a/Tests/RunCMake/CommandLine/RunCMakeTest.cmake b/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
index 416b94e7d..84d4cc904 100644
--- a/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
@@ -28,9 +28,24 @@ run_cmake_command(build-no-cache
   ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR})
 run_cmake_command(build-no-generator
   ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR}/cache-no-generator)
+run_cmake_command(build-bad-dir
+  ${CMAKE_COMMAND} --build dir-does-not-exist)
 run_cmake_command(build-bad-generator
   ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR}/cache-bad-generator)
 
+function(run_BuildDir)
+  # Use a single build tree for a few tests without cleaning.
+  set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/BuildDir-build)
+  set(RunCMake_TEST_NO_CLEAN 1)
+  file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")
+  file(MAKE_DIRECTORY "${RunCMake_TEST_BINARY_DIR}")
+
+  run_cmake(BuildDir)
+  run_cmake_command(BuildDir--build ${CMAKE_COMMAND} -E chdir ..
+    ${CMAKE_COMMAND} --build BuildDir-build --target CustomTarget)
+endfunction()
+run_BuildDir()
+
 if(RunCMake_GENERATOR STREQUAL "Ninja")
   # Use a single build tree for a few tests without cleaning.
   set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/Build-build)
diff --git a/Tests/RunCMake/CommandLine/build-bad-dir-result.txt b/Tests/RunCMake/CommandLine/build-bad-dir-result.txt
new file mode 100644
index 000000000..d00491fd7
--- /dev/null
+++ b/Tests/RunCMake/CommandLine/build-bad-dir-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/CommandLine/build-bad-dir-stderr.txt b/Tests/RunCMake/CommandLine/build-bad-dir-stderr.txt
new file mode 100644
index 000000000..d3f3d9ce0
--- /dev/null
+++ b/Tests/RunCMake/CommandLine/build-bad-dir-stderr.txt
@@ -0,0 +1,2 @@
+^Error: [^
+]+/Tests/RunCMake/CommandLine/build-bad-dir-build/dir-does-not-exist is not a directory$