diff --git a/contrib/extractor_scripts/ExtractResources.sh b/contrib/extractor_scripts/ExtractResources.sh
index dcc17997a1..d3a26bbd83 100755
--- a/contrib/extractor_scripts/ExtractResources.sh
+++ b/contrib/extractor_scripts/ExtractResources.sh
@@ -144,8 +144,10 @@ then
   echo "How many CPU threads should be used for extracting mmaps? (leave empty to use all available threads)"
   read line
   echo
-  if [[ ! -z $line ]]; then
-    if [[ $line =~ ^[1-9+]$ ]]; then
+  # check string is there
+  if [ ! -z $line ]; then
+    # and a number greater 0
+    if [ "$(expr "$line" : "^[1-9][0-9]*$")" -gt 0 ]; then
       NUM_THREAD=$line
     else
       echo "Only numbers are allowed!"
@@ -252,8 +254,9 @@ if [ "$USE_VMAPS" = "1" ]
 then
   echo "$(date): Start extraction of vmaps..." | tee -a $LOG_FILE
   $PREFIX/vmap_extractor $VMAP_RES $VMAP_OPT_RES | tee -a $DETAIL_LOG_FILE
-  exit_code="${PIPESTATUS[0]}"
-  if [[ "$exit_code" -ne "0" ]]; then
+  # $? has the exit code of the last closed pipeline, vmap_extractor in this case
+  exit_code="$?"
+  if [ "$exit_code" -ne "0" ]; then
     echo "$(date): Extraction of vmaps failed with errors. Aborting extraction. See the log file for more details."
     exit "$exit_code"
   fi
@@ -264,8 +267,9 @@ then
   fi
   echo "$(date): Start assembling of vmaps..." | tee -a $LOG_FILE
   $PREFIX/vmap_assembler ${OUTPUT_PATH:-.}/Buildings ${OUTPUT_PATH:-.}/vmaps | tee -a $DETAIL_LOG_FILE
-  exit_code="${PIPESTATUS[0]}"
-  if [[ "$exit_code" -ne "0" ]]; then
+  # $? has the exit code of the last closed pipeline, vmap_assembler in this case
+  exit_code="$?"
+  if [ "$exit_code" -ne "0" ]; then
     echo "$(date): Assembling of vmaps failed with errors. Aborting extraction. See the log file for more details."
     exit "$exit_code"
   fi
diff --git a/contrib/mmap/CMakeLists.txt b/contrib/mmap/CMakeLists.txt
index 2cd476fb1e..b4a7dea7f1 100644
--- a/contrib/mmap/CMakeLists.txt
+++ b/contrib/mmap/CMakeLists.txt
@@ -119,6 +119,6 @@ if (BUILD_EXTRACTORS)
   endif()
 
   install(TARGETS ${EXECUTABLE_NAME} DESTINATION ${BIN_DIR}/tools)
-  install(FILES "${CMAKE_SOURCE_DIR}/contrib/extractor_scripts/MoveMapGen.sh" DESTINATION ${BIN_DIR}/tools)
+  install(PROGRAMS "${CMAKE_SOURCE_DIR}/contrib/extractor_scripts/MoveMapGen.sh" DESTINATION ${BIN_DIR}/tools)
   install(FILES "${CMAKE_SOURCE_DIR}/contrib/extractor_scripts/offmesh.txt" DESTINATION ${BIN_DIR}/tools)
 endif()
diff --git a/contrib/vmap_extractor/vmapextract/CMakeLists.txt b/contrib/vmap_extractor/vmapextract/CMakeLists.txt
index a618d6f36e..8f81bb17b9 100644
--- a/contrib/vmap_extractor/vmapextract/CMakeLists.txt
+++ b/contrib/vmap_extractor/vmapextract/CMakeLists.txt
@@ -37,5 +37,5 @@ if(MSVC)
     COMMAND ${CMAKE_COMMAND} -E copy_if_different \"${CMAKE_SOURCE_DIR}/contrib/extractor_scripts/ExtractResources.sh\" \"$<TARGET_FILE_DIR:${EXECUTABLE_NAME}>\")
 endif()
 
-install(FILES "${CMAKE_SOURCE_DIR}/contrib/extractor_scripts/ExtractResources.sh" DESTINATION ${BIN_DIR}/tools)
+install(PROGRAMS "${CMAKE_SOURCE_DIR}/contrib/extractor_scripts/ExtractResources.sh" DESTINATION ${BIN_DIR}/tools)
 install(TARGETS ${EXECUTABLE_NAME} DESTINATION ${BIN_DIR}/tools)