diff --git a/SConstruct b/SConstruct
index f61309fa9..694d494fb 100644
--- a/SConstruct
+++ b/SConstruct
@@ -704,11 +704,7 @@ def FindBoost(context, prefixes, thread_flag):
     BOOST_INCLUDE_DIR = None
     BOOST_APPEND = None
     env['BOOST_APPEND'] = str()
-
-    if env['THREADING'] == 'multi':
-        search_lib = 'libboost_thread'
-    else:
-        search_lib = 'libboost_filesystem'
+    search_lib = 'libboost_filesystem'
 
     # note: must call normpath to strip trailing slash otherwise dirname
     # does not remove 'lib' and 'include'
@@ -1411,15 +1407,6 @@ if not preconfigured:
             ['program_options', 'boost/program_options.hpp', False]
         ]
 
-        if env['THREADING'] == 'multi':
-            BOOST_LIBSHEADERS.append(['thread', 'boost/thread/mutex.hpp', True])
-            # on solaris the configure checks for boost_thread
-            # require the -pthreads flag to be able to check for
-            # threading support, so we add as a global library instead
-            # of attaching to cxxflags after configure
-            if env['PLATFORM'] == 'SunOS':
-                env.Append(CXXFLAGS = '-pthreads')
-
         # if requested, sort LIBPATH and CPPPATH before running CheckLibWithHeader tests
         if env['PRIORITIZE_LINKING']:
             conf.prioritize_paths(silent=True)
diff --git a/bootstrap.sh b/bootstrap.sh
index 3a6470990..e3ee8bc8f 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -10,7 +10,7 @@ todo
 - shrink icu data
 '
 
-MASON_VERSION="694d08c"
+MASON_VERSION="3e0cc5a"
 
 function setup_mason() {
     if [[ ! -d ./.mason ]]; then
@@ -20,7 +20,6 @@ function setup_mason() {
         echo "Updating to latest mason"
         (cd ./.mason && git fetch && git checkout ${MASON_VERSION})
     fi
-    export MASON_DIR=$(pwd)/.mason
     export PATH=$(pwd)/.mason:$PATH
     export CXX=${CXX:-clang++}
     export CC=${CC:-clang}
@@ -63,8 +62,11 @@ function install_mason_deps() {
     wait
     install webp 0.4.2 libwebp &
     install gdal 1.11.2 libgdal &
-    install boost 1.59.0 &
-    install boost_liball 1.59.0 &
+    install boost 1.61.0 &
+    install boost_libsystem 1.61.0 &
+    install boost_libfilesystem 1.61.0 &
+    install boost_libprogram_options 1.61.0 &
+    install boost_libregex 1.61.0 &
     install freetype 2.6 libfreetype &
     install harfbuzz 0.9.41 libharfbuzz &
     wait