diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f59baac2626b15469be898b1003c153933de6885..76ca6e10df03c4d24fda0e13f62d40289e46e53e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -57,6 +57,7 @@ fast-build:
   extends: .general
   only: [merge_requests]
   stage: build
+  dependencies: []
 
 debian-build:
   extends: .common-build
diff --git a/CI/ubuntu-18.04-llvm-nodoc.cmake b/CI/ubuntu-18.04-llvm-nodoc.cmake
new file mode 100644
index 0000000000000000000000000000000000000000..27ab15d0cd7e0e9c9a7802f2831baf5ef5e5f180
--- /dev/null
+++ b/CI/ubuntu-18.04-llvm-nodoc.cmake
@@ -0,0 +1,32 @@
+#
+# Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
+#
+# This file is part of Orfeo Toolbox
+#
+#     https://www.orfeo-toolbox.org/
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Configuration options for ubuntu-18.04-llvm-nodoc
+
+set(site_option
+"opencv_INCLUDE_DIR:PATH=/usr/include
+CMAKE_C_COMPILER:STRING=clang
+CMAKE_CXX_COMPILER:STRING=clang++
+CMAKE_EXE_LINKER_FLAGS:STRING=-fuse-ld=lld
+CMAKE_MODULE_LINKER_FLAGS:STRING=-fuse-ld=lld
+CMAKE_SHARED_LINKER_FLAGS:STRING=-fuse-ld=lld
+CMAKE_C_COMPILER_LAUNCHER:STRING=ccache
+CMAKE_CXX_COMPILER_LAUNCHER:STRING=ccache
+OTB_USE_SHARK:BOOL=OFF")
diff --git a/CI/ubuntu-18.04-llvm.cmake b/CI/ubuntu-18.04-llvm.cmake
index 6480ab2f31b9ddb22b56a15d61ac305a85e85423..9b838da433a06cff9f26281578ad56c0b20c52ec 100644
--- a/CI/ubuntu-18.04-llvm.cmake
+++ b/CI/ubuntu-18.04-llvm.cmake
@@ -49,6 +49,7 @@ OTB_DOXYGEN_ITK_DOXYGEN_URL:STRING=\"https://itk.org/Doxygen413/html\"
   # See otb-devutils/Scripts/tagfile_fix.py
   message(STATUS "Get resources for Doxygen build ...")
   execute_process(COMMAND wget https://www.orfeo-toolbox.org/packages/archives/Doxygen/InsightDoxygenDocTag-4.13.0.gz
-                  COMMAND gzip -d InsightDoxygenDocTag-4.13.0.gz
+                  WORKING_DIRECTORY ${CTEST_BINARY_DIRECTORY})
+  execute_process(COMMAND gzip -d InsightDoxygenDocTag-4.13.0.gz
                   WORKING_DIRECTORY ${CTEST_BINARY_DIRECTORY})
 endif()