diff --git a/.jenkins.d/10-build.sh b/.jenkins.d/10-build.sh
index f0fb72e..58599ea 100755
--- a/.jenkins.d/10-build.sh
+++ b/.jenkins.d/10-build.sh
@@ -1,10 +1,11 @@
 #!/usr/bin/env bash
-set -x
 set -e
 
 JDIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
 source "$JDIR"/util.sh
 
+set -x
+
 pushd ns-3 >/dev/null
 
 git submodule update --init
@@ -13,15 +14,18 @@
 sudo rm -Rf build/ .waf-1* .waf3-1*
 find . -name '*.pyc' | sudo xargs rm -f
 
-# Configure/build in debug mode
 if has OSX $NODE_LABELS; then
     export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/opt/libxml2/lib/pkgconfig"
+    if [[ -n $USE_OPENSSL_1_1 ]]; then
+        OPENSSL="--with-openssl=/usr/local/opt/openssl@1.1"
+    fi
 fi
-./waf -j${WAF_JOBS:-1} configure -d debug --enable-examples --enable-tests $EXTRA_FLAGS
+
+./waf -j${WAF_JOBS:-1} configure -d debug --enable-examples --enable-tests $OPENSSL
 ./waf -j${WAF_JOBS:-1} build
 
 # Install
-sudo ./waf -j${WAF_JOBS:-1} install
+sudo_preserve_env PATH -- ./waf -j${WAF_JOBS:-1} install
 
 if has Linux $NODE_LABELS; then
     sudo ldconfig