diff --git a/net/net.sh b/net/net.sh
index 5d3f8b477..41e01cba4 100755
--- a/net/net.sh
+++ b/net/net.sh
@@ -36,6 +36,7 @@ Operate a configured testnet
                                  (ignored if -s or -S is specified)
    -r                          - Reuse existing node/ledger configuration from a
                                  previous |start| (ie, don't run ./multinode-demo/setup.sh).
+   -D /path/to/programs        - Deploy custom programs from this location
 
  sanity/start/update-specific options:
    -o noLedgerVerify    - Skip ledger verification
@@ -62,12 +63,13 @@ sanityExtraArgs=
 cargoFeatures=
 skipSetup=false
 updateNodes=false
+customPrograms=
 
 command=$1
 [[ -n $command ]] || usage
 shift
 
-while getopts "h?S:s:T:t:o:f:r" opt; do
+while getopts "h?S:s:T:t:o:f:r:D:" opt; do
   case $opt in
   h | \?)
     usage
@@ -110,6 +112,9 @@ while getopts "h?S:s:T:t:o:f:r" opt; do
   r)
     skipSetup=true
     ;;
+  D)
+    customPrograms=$OPTARG
+    ;;
   o)
     case $OPTARG in
     noLedgerVerify|noValidatorSanity|rejectExtraNodes)
@@ -149,6 +154,9 @@ build() {
     $MAYBE_DOCKER bash -c "
       set -ex
       scripts/cargo-install-all.sh farf \"$cargoFeatures\"
+      if [[ -n $customPrograms ]]; then
+        scripts/cargo-install-custom-programs.sh farf $customPrograms
+      fi
     "
   )
   echo "Build took $SECONDS seconds"
diff --git a/scripts/cargo-install-custom-programs.sh b/scripts/cargo-install-custom-programs.sh
new file mode 100755
index 000000000..cfd210a87
--- /dev/null
+++ b/scripts/cargo-install-custom-programs.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+#
+# This script will install all cargo workspace libraries found in
+# `programDir` as native programs.
+set -e
+
+# Directory to install libraries into
+installDir="$(mkdir -p "$1"; cd "$1"; pwd)"
+
+# Where to find custom programs
+programDir="$2"
+
+(
+  set -x
+  cd "$programDir"
+  cargo build --all --release
+)
+
+for dir in "$programDir"/*; do
+  for program in $programDir/target/release/deps/lib"$(basename "$dir")".{so,dylib,dll}; do
+    if [[ -f $program ]]; then
+      (
+        set -x
+        mkdir -p "$installDir/bin/deps"
+        rm -f "$installDir/bin/deps/$(basename "$program")"
+        cp -v "$program" "$installDir"/bin/deps
+      )
+    fi
+  done
+done