diff --git a/bin/_blackbox_common.sh b/bin/_blackbox_common.sh
index b2b9cb9..97fc059 100755
--- a/bin/_blackbox_common.sh
+++ b/bin/_blackbox_common.sh
@@ -409,7 +409,7 @@ function file_contains_line() {
 function md5sum_file() {
   # Portably generate the MD5 hash of file $1.
   case $(uname -s) in
-    Darwin )
+    Darwin | FreeBSD )
       md5 -r "$1" | awk '{ print $1 }'
       ;;
     Linux | CYGWIN* | MINGW* )
@@ -425,7 +425,7 @@ function md5sum_file() {
 function cp_permissions() {
   # Copy the perms of $1 onto $2 .. end.
   case $(uname -s) in
-    Darwin )
+    Darwin | FreeBSD )
       chmod $( stat -f '%p' "$1" ) "${@:2}"
       ;;
     Linux | CYGWIN* | MINGW* )
diff --git a/bin/_stack_lib.sh b/bin/_stack_lib.sh
index 24a9759..d2edd36 100755
--- a/bin/_stack_lib.sh
+++ b/bin/_stack_lib.sh
@@ -53,7 +53,7 @@ function create_self_deleting_tempfile() {
   local filename
 
   case $(uname -s) in
-    Darwin )
+    Darwin | FreeBSD )
       : "${TMPDIR:=/tmp}" ;
       filename=$(mktemp -t _stacklib_.XXXXXXXX )
       ;;
@@ -74,7 +74,7 @@ function create_self_deleting_tempdir() {
   local filename
 
   case $(uname -s) in
-    Darwin )
+    Darwin | FreeBSD )
       : "${TMPDIR:=/tmp}" ;
       filename=$(mktemp -d -t _stacklib_.XXXXXXXX )
       ;;
@@ -98,7 +98,7 @@ function make_self_deleting_tempfile() {
   local name
 
   case $(uname -s) in
-    Darwin )
+    Darwin | FreeBSD )
       : "${TMPDIR:=/tmp}" ;
       name=$(mktemp -t _stacklib_.XXXXXXXX )
       ;;
@@ -120,7 +120,7 @@ function make_tempdir() {
   local name
 
   case $(uname -s) in
-    Darwin )
+    Darwin | FreeBSD )
       : "${TMPDIR:=/tmp}" ;
       name=$(mktemp -d -t _stacklib_.XXXXXXXX )
       ;;
@@ -157,7 +157,7 @@ function fail_if_not_running_as_root() {
 function fail_if_in_root_directory() {
   # Verify nobody has tricked us into being in "/".
   case $(uname -s) in
-    Darwin )
+    Darwin | FreeBSD )
       if [[ $(stat -f'%i' / ) == $(stat -f'%i' . ) ]] ; then
         echo 'SECURITY ALERT: The current directory is the root directory.'
         echo 'Exiting...'