From 7d514c3a83f05ff0baf197e5d0790cba726ac202 Mon Sep 17 00:00:00 2001
From: Dan Miller <dan@cypherstack.com>
Date: Wed, 27 May 2026 12:08:48 -0700
Subject: [PATCH 1/2] Parameterize build_all.sh, remove per-app build script
 variants

---
 scripts/android/build_all.sh          | 20 +++++++++++++-------
 scripts/android/build_all_campfire.sh | 15 ---------------
 scripts/android/build_all_duo.sh      | 18 ------------------
 scripts/build_app.sh                  | 11 +----------
 scripts/ios/build_all.sh              | 26 ++++++++++++--------------
 scripts/ios/build_all_campfire.sh     | 22 ----------------------
 scripts/ios/build_all_duo.sh          | 26 --------------------------
 scripts/linux/build_all.sh            | 20 +++++++++++++-------
 scripts/linux/build_all_campfire.sh   | 19 -------------------
 scripts/linux/build_all_duo.sh        | 24 ------------------------
 scripts/macos/build_all.sh            | 20 ++++++++++++--------
 scripts/macos/build_all_campfire.sh   | 11 -----------
 scripts/macos/build_all_duo.sh        | 16 ----------------
 scripts/windows/build_all.sh          | 20 +++++++++++++-------
 scripts/windows/build_all_campfire.sh | 14 --------------
 scripts/windows/build_all_duo.sh      | 18 ------------------
 16 files changed, 64 insertions(+), 236 deletions(-)
 delete mode 100755 scripts/android/build_all_campfire.sh
 delete mode 100755 scripts/android/build_all_duo.sh
 delete mode 100755 scripts/ios/build_all_campfire.sh
 delete mode 100755 scripts/ios/build_all_duo.sh
 delete mode 100755 scripts/linux/build_all_campfire.sh
 delete mode 100755 scripts/linux/build_all_duo.sh
 delete mode 100755 scripts/macos/build_all_campfire.sh
 delete mode 100755 scripts/macos/build_all_duo.sh
 delete mode 100755 scripts/windows/build_all_campfire.sh
 delete mode 100755 scripts/windows/build_all_duo.sh

diff --git a/scripts/android/build_all.sh b/scripts/android/build_all.sh
index c13540403b..1ee7c10cf7 100755
--- a/scripts/android/build_all.sh
+++ b/scripts/android/build_all.sh
@@ -2,21 +2,27 @@
 
 set -x -e
 
+APP="${1:-stack_wallet}"
+
 mkdir -p build
 . ./config.sh
 
 PLUGINS_DIR=../../crypto_plugins
 
-# libepiccash requires old rust
 source ../rust_version.sh
-set_rust_version_for_libepiccash
-(cd "${PLUGINS_DIR}"/flutter_libepiccash/scripts/android && ./build_all.sh )
-set_rust_version_for_libmwc
-(cd "${PLUGINS_DIR}"/flutter_libmwc/scripts/android && ./build_all.sh )
-# set rust (back) to a more recent stable release after building epiccash
+
+if [[ "$APP" = "stack_wallet" ]]; then
+    set_rust_version_for_libepiccash
+    (cd "${PLUGINS_DIR}"/flutter_libepiccash/scripts/android && ./build_all.sh )
+    set_rust_version_for_libmwc
+    (cd "${PLUGINS_DIR}"/flutter_libmwc/scripts/android && ./build_all.sh )
+fi
+
 set_rust_to_everything_else
 
-(cd "${PLUGINS_DIR}"/frostdart/scripts/android && ./build_all.sh )
+if [[ "$APP" = "stack_wallet" || "$APP" = "stack_duo" ]]; then
+    (cd "${PLUGINS_DIR}"/frostdart/scripts/android && ./build_all.sh )
+fi
 
 wait
 echo "Done building"
diff --git a/scripts/android/build_all_campfire.sh b/scripts/android/build_all_campfire.sh
deleted file mode 100755
index fd10e418fa..0000000000
--- a/scripts/android/build_all_campfire.sh
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-mkdir -p build
-. ./config.sh
-
-PLUGINS_DIR=../../crypto_plugins
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-wait
-echo "Done building"
diff --git a/scripts/android/build_all_duo.sh b/scripts/android/build_all_duo.sh
deleted file mode 100755
index dcfc24427a..0000000000
--- a/scripts/android/build_all_duo.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-# todo: revisit following at some point
-
-mkdir -p build
-. ./config.sh
-
-PLUGINS_DIR=../../crypto_plugins
-
-source ../rust_version.sh
-set_rust_to_everything_else
-
-(cd "${PLUGINS_DIR}"/frostdart/scripts/android && ./build_all.sh )
-
-wait
-echo "Done building"
diff --git a/scripts/build_app.sh b/scripts/build_app.sh
index 71a5ec6bcd..051236d09e 100755
--- a/scripts/build_app.sh
+++ b/scripts/build_app.sh
@@ -119,16 +119,7 @@ if [ "$BUILD_CRYPTO_PLUGINS" -eq 0 ]; then
     if [ "$DOWNLOAD_CRYPTO_PLUGINS" -eq 1 ]; then
         ./download_all.sh "$APP_NAMED_ID"
     else
-        if [[ "$APP_NAMED_ID" = "stack_wallet" ]]; then
-            ./build_all.sh
-        elif [[ "$APP_NAMED_ID" = "stack_duo" ]]; then
-            ./build_all_duo.sh
-        elif [[ "$APP_NAMED_ID" = "campfire" ]]; then
-            ./build_all_campfire.sh
-        else
-            echo "Invalid app id: ${APP_NAMED_ID}"
-            exit 1
-        fi
+        ./build_all.sh "$APP_NAMED_ID"
     fi
 fi
 
diff --git a/scripts/ios/build_all.sh b/scripts/ios/build_all.sh
index ed5fb236fd..f025c6c250 100755
--- a/scripts/ios/build_all.sh
+++ b/scripts/ios/build_all.sh
@@ -2,28 +2,26 @@
 
 set -x -e
 
-# ensure ios rust triples are there
-rustup target add aarch64-apple-ios
-rustup target add x86_64-apple-ios
+APP="${1:-stack_wallet}"
 
 # ensure ios rust triples are there
 rustup target add aarch64-apple-ios
 rustup target add x86_64-apple-ios
 
-# libepiccash requires old rust
 source ../rust_version.sh
-set_rust_version_for_libepiccash
-(cd ../../crypto_plugins/flutter_libepiccash/scripts/ios && ./build_all.sh )
-set_rust_version_for_libmwc
-(cd ../../crypto_plugins/flutter_libmwc/scripts/ios/ && ./build_all.sh )
-# set rust (back) to a more recent stable release after building epiccash
+
+if [[ "$APP" = "stack_wallet" ]]; then
+    set_rust_version_for_libepiccash
+    (cd ../../crypto_plugins/flutter_libepiccash/scripts/ios && ./build_all.sh )
+    set_rust_version_for_libmwc
+    (cd ../../crypto_plugins/flutter_libmwc/scripts/ios/ && ./build_all.sh )
+fi
+
 set_rust_to_everything_else
 
-(cd ../../crypto_plugins/frostdart/scripts/ios && ./build_all.sh )
+if [[ "$APP" = "stack_wallet" || "$APP" = "stack_duo" ]]; then
+    (cd ../../crypto_plugins/frostdart/scripts/ios && ./build_all.sh )
+fi
 
 wait
 echo "Done building"
-
-# ensure ios rust triples are there
-rustup target add aarch64-apple-ios
-rustup target add x86_64-apple-ios
diff --git a/scripts/ios/build_all_campfire.sh b/scripts/ios/build_all_campfire.sh
deleted file mode 100755
index 994b682446..0000000000
--- a/scripts/ios/build_all_campfire.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-# ensure ios rust triples are there
-rustup target add aarch64-apple-ios
-rustup target add x86_64-apple-ios
-
-# ensure ios rust triples are there
-rustup target add aarch64-apple-ios
-rustup target add x86_64-apple-ios
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-wait
-echo "Done building"
-
-# ensure ios rust triples are there
-rustup target add aarch64-apple-ios
-rustup target add x86_64-apple-ios
diff --git a/scripts/ios/build_all_duo.sh b/scripts/ios/build_all_duo.sh
deleted file mode 100755
index c09b3528fa..0000000000
--- a/scripts/ios/build_all_duo.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-# todo: revisit following at some point
-
-# ensure ios rust triples are there
-rustup target add aarch64-apple-ios
-rustup target add x86_64-apple-ios
-
-# ensure ios rust triples are there
-rustup target add aarch64-apple-ios
-rustup target add x86_64-apple-ios
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-(cd ../../crypto_plugins/frostdart/scripts/ios && ./build_all.sh )
-
-wait
-echo "Done building"
-
-# ensure ios rust triples are there
-rustup target add aarch64-apple-ios
-rustup target add x86_64-apple-ios
diff --git a/scripts/linux/build_all.sh b/scripts/linux/build_all.sh
index 374b2d4621..d2c703d218 100755
--- a/scripts/linux/build_all.sh
+++ b/scripts/linux/build_all.sh
@@ -2,6 +2,8 @@
 
 set -x -e
 
+APP="${1:-stack_wallet}"
+
 # for arm
 # flutter-elinux clean
 # flutter-elinux pub get
@@ -9,16 +11,20 @@ set -x -e
 mkdir -p build
 ./build_secure_storage_deps.sh
 
-# libepiccash requires old rust
 source ../rust_version.sh
-set_rust_version_for_libepiccash
-(cd ../../crypto_plugins/flutter_libepiccash/scripts/linux && ./build_all.sh )
-set_rust_version_for_libmwc
-(cd ../../crypto_plugins/flutter_libmwc/scripts/linux && ./build_all.sh )
-# set rust (back) to a more recent stable release after building epiccash
+
+if [[ "$APP" = "stack_wallet" ]]; then
+    set_rust_version_for_libepiccash
+    (cd ../../crypto_plugins/flutter_libepiccash/scripts/linux && ./build_all.sh )
+    set_rust_version_for_libmwc
+    (cd ../../crypto_plugins/flutter_libmwc/scripts/linux && ./build_all.sh )
+fi
+
 set_rust_to_everything_else
 
-(cd ../../crypto_plugins/frostdart/scripts/linux && ./build_all.sh )
+if [[ "$APP" = "stack_wallet" || "$APP" = "stack_duo" ]]; then
+    (cd ../../crypto_plugins/frostdart/scripts/linux && ./build_all.sh )
+fi
 
 ./build_secp256k1.sh
 
diff --git a/scripts/linux/build_all_campfire.sh b/scripts/linux/build_all_campfire.sh
deleted file mode 100755
index d1e1de71a1..0000000000
--- a/scripts/linux/build_all_campfire.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-# for arm
-# flutter-elinux clean
-# flutter-elinux pub get
-# flutter-elinux build linux --dart-define="IS_ARM=true"
-mkdir -p build
-./build_secure_storage_deps.sh
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-./build_secp256k1.sh
-
-wait
-echo "Done building"
diff --git a/scripts/linux/build_all_duo.sh b/scripts/linux/build_all_duo.sh
deleted file mode 100755
index 3e2ee5b5b1..0000000000
--- a/scripts/linux/build_all_duo.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-# todo: revisit following at some point
-
-
-# for arm
-# flutter-elinux clean
-# flutter-elinux pub get
-# flutter-elinux build linux --dart-define="IS_ARM=true"
-mkdir -p build
-./build_secure_storage_deps.sh
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-(cd ../../crypto_plugins/frostdart/scripts/linux && ./build_all.sh )
-
-./build_secp256k1.sh
-
-wait
-echo "Done building"
diff --git a/scripts/macos/build_all.sh b/scripts/macos/build_all.sh
index 2012568b10..4dbefd5e53 100755
--- a/scripts/macos/build_all.sh
+++ b/scripts/macos/build_all.sh
@@ -2,18 +2,22 @@
 
 set -x -e
 
+APP="${1:-stack_wallet}"
 
-# libepiccash requires old rust
 source ../rust_version.sh
-set_rust_version_for_libepiccash
-(cd ../../crypto_plugins/flutter_libepiccash/scripts/macos && ./build_all.sh )
-set_rust_version_for_libmwc
-(cd ../../crypto_plugins/flutter_libmwc/scripts/macos && ./build_all.sh )
-# set rust (back) to a more recent stable release after building epiccash
+
+if [[ "$APP" = "stack_wallet" ]]; then
+    set_rust_version_for_libepiccash
+    (cd ../../crypto_plugins/flutter_libepiccash/scripts/macos && ./build_all.sh )
+    set_rust_version_for_libmwc
+    (cd ../../crypto_plugins/flutter_libmwc/scripts/macos && ./build_all.sh )
+fi
+
 set_rust_to_everything_else
 
-(cd ../../crypto_plugins/frostdart/scripts/macos && ./build_all.sh )
+if [[ "$APP" = "stack_wallet" || "$APP" = "stack_duo" ]]; then
+    (cd ../../crypto_plugins/frostdart/scripts/macos && ./build_all.sh )
+fi
 
 wait
 echo "Done building"
-
diff --git a/scripts/macos/build_all_campfire.sh b/scripts/macos/build_all_campfire.sh
deleted file mode 100755
index e1b4216bc0..0000000000
--- a/scripts/macos/build_all_campfire.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-wait
-echo "Done building"
diff --git a/scripts/macos/build_all_duo.sh b/scripts/macos/build_all_duo.sh
deleted file mode 100755
index a618eeebb7..0000000000
--- a/scripts/macos/build_all_duo.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-# todo: revisit following at some point
-
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-(cd ../../crypto_plugins/frostdart/scripts/macos && ./build_all.sh )
-
-wait
-echo "Done building"
-
diff --git a/scripts/windows/build_all.sh b/scripts/windows/build_all.sh
index 50513331ba..6d3f3f55b8 100755
--- a/scripts/windows/build_all.sh
+++ b/scripts/windows/build_all.sh
@@ -2,18 +2,24 @@
 
 set -x -e
 
+APP="${1:-stack_wallet}"
+
 mkdir -p build
 
-# libepiccash requires old rust
 source ../rust_version.sh
-set_rust_version_for_libepiccash
-(cd ../../crypto_plugins/flutter_libepiccash/scripts/windows && ./build_all.sh )
-set_rust_version_for_libmwc
-(cd ../../crypto_plugins/flutter_libmwc/scripts/windows && ./build_all.sh )
-# set rust (back) to a more recent stable release after building epiccash
+
+if [[ "$APP" = "stack_wallet" ]]; then
+    set_rust_version_for_libepiccash
+    (cd ../../crypto_plugins/flutter_libepiccash/scripts/windows && ./build_all.sh )
+    set_rust_version_for_libmwc
+    (cd ../../crypto_plugins/flutter_libmwc/scripts/windows && ./build_all.sh )
+fi
+
 set_rust_to_everything_else
 
-(cd ../../crypto_plugins/frostdart/scripts/windows && ./build_all.sh )
+if [[ "$APP" = "stack_wallet" || "$APP" = "stack_duo" ]]; then
+    (cd ../../crypto_plugins/frostdart/scripts/windows && ./build_all.sh )
+fi
 
 ./build_secp256k1_wsl.sh
 
diff --git a/scripts/windows/build_all_campfire.sh b/scripts/windows/build_all_campfire.sh
deleted file mode 100755
index e74572b457..0000000000
--- a/scripts/windows/build_all_campfire.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-mkdir -p build
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-./build_secp256k1_wsl.sh
-
-wait
-echo "Done building"
diff --git a/scripts/windows/build_all_duo.sh b/scripts/windows/build_all_duo.sh
deleted file mode 100755
index 42ff340c37..0000000000
--- a/scripts/windows/build_all_duo.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/bash
-
-set -x -e
-
-# todo: revisit following at some point
-
-mkdir -p build
-
-# libepiccash requires old rust
-source ../rust_version.sh
-set_rust_to_everything_else
-
-(cd ../../crypto_plugins/frostdart/scripts/windows && ./build_all.sh )
-
-./build_secp256k1_wsl.sh
-
-wait
-echo "Done building"

From 0d3742dfb49cf82931fbab134c161e4a0a13e5f1 Mon Sep 17 00:00:00 2001
From: Dan Miller <dan@cypherstack.com>
Date: Wed, 27 May 2026 12:51:46 -0700
Subject: [PATCH 2/2] use portable sed -i.bak in configure and version scripts
 from @parasew

---
 scripts/app_config/configure_stack_duo.sh     | 13 +++++--------
 scripts/app_config/configure_stack_wallet.sh  | 13 +++++--------
 .../platforms/macos/platform_config.sh        | 19 ++++++++++++++-----
 scripts/app_config/shared/update_version.sh   | 15 ++++++---------
 4 files changed, 30 insertions(+), 30 deletions(-)

diff --git a/scripts/app_config/configure_stack_duo.sh b/scripts/app_config/configure_stack_duo.sh
index 502e1a056d..7d6bae012d 100755
--- a/scripts/app_config/configure_stack_duo.sh
+++ b/scripts/app_config/configure_stack_duo.sh
@@ -14,14 +14,11 @@ NEW_PUBSPEC_NAME="stackduo"
 PUBSPEC_FILE="${APP_PROJECT_ROOT_DIR}/pubspec.yaml"
 
 # String replacements.
-if [[ "$(uname)" == 'Darwin' ]]; then
-  # macos specific sed
-  sed -i '' "s/name: PLACEHOLDER/name: ${NEW_PUBSPEC_NAME}/g" "${PUBSPEC_FILE}"
-  sed -i '' "s/description: PLACEHOLDER/description: ${NEW_NAME}/g" "${PUBSPEC_FILE}"
-else
-  sed -i "s/name: PLACEHOLDER/name: ${NEW_PUBSPEC_NAME}/g" "${PUBSPEC_FILE}"
-  sed -i "s/description: PLACEHOLDER/description: ${NEW_NAME}/g" "${PUBSPEC_FILE}"
-fi
+sed -i.bak \
+  -e "s/name: PLACEHOLDER/name: ${NEW_PUBSPEC_NAME}/g" \
+  -e "s/description: PLACEHOLDER/description: ${NEW_NAME}/g" \
+  "${PUBSPEC_FILE}"
+rm -f "${PUBSPEC_FILE}.bak"
 
 dart "${APP_PROJECT_ROOT_DIR}/tool/process_pubspec_deps.dart" \
       "${PUBSPEC_FILE}" \
diff --git a/scripts/app_config/configure_stack_wallet.sh b/scripts/app_config/configure_stack_wallet.sh
index 03d9562692..bf3d6c6621 100755
--- a/scripts/app_config/configure_stack_wallet.sh
+++ b/scripts/app_config/configure_stack_wallet.sh
@@ -14,14 +14,11 @@ NEW_PUBSPEC_NAME="stackwallet"
 PUBSPEC_FILE="${APP_PROJECT_ROOT_DIR}/pubspec.yaml"
 
 # String replacements.
-if [[ "$(uname)" == 'Darwin' ]]; then
-  # macos specific sed
-  sed -i '' "s/name: PLACEHOLDER/name: ${NEW_PUBSPEC_NAME}/g" "${PUBSPEC_FILE}"
-  sed -i '' "s/description: PLACEHOLDER/description: ${NEW_NAME}/g" "${PUBSPEC_FILE}"
-else
-  sed -i "s/name: PLACEHOLDER/name: ${NEW_PUBSPEC_NAME}/g" "${PUBSPEC_FILE}"
-  sed -i "s/description: PLACEHOLDER/description: ${NEW_NAME}/g" "${PUBSPEC_FILE}"
-fi
+sed -i.bak \
+  -e "s/name: PLACEHOLDER/name: ${NEW_PUBSPEC_NAME}/g" \
+  -e "s/description: PLACEHOLDER/description: ${NEW_NAME}/g" \
+  "${PUBSPEC_FILE}"
+rm -f "${PUBSPEC_FILE}.bak"
 
 dart "${APP_PROJECT_ROOT_DIR}/tool/process_pubspec_deps.dart" \
       "${PUBSPEC_FILE}" \
diff --git a/scripts/app_config/platforms/macos/platform_config.sh b/scripts/app_config/platforms/macos/platform_config.sh
index c54ba32a6e..dd71bc1178 100755
--- a/scripts/app_config/platforms/macos/platform_config.sh
+++ b/scripts/app_config/platforms/macos/platform_config.sh
@@ -13,8 +13,17 @@ for (( i=0; i<=2; i++ )); do
 done
 
 # Configure macOS for Duo.
-sed -i '' "s/${APP_ID_PLACEHOLDER_CAMEL}/${NEW_APP_ID_CAMEL}/g" "${APP_PROJECT_ROOT_DIR}/${MAC_TF_0}"
-sed -i '' "s/${APP_NAME_PLACEHOLDER}/${NEW_NAME}/g" "${APP_PROJECT_ROOT_DIR}/${MAC_TF_0}"
-sed -i '' "s/${APP_NAME_PLACEHOLDER}/${NEW_NAME}/g" "${APP_PROJECT_ROOT_DIR}/${MAC_TF_1}"
-sed -i '' "s/${APP_NAME_PLACEHOLDER}/${NEW_NAME}/g" "${APP_PROJECT_ROOT_DIR}/${MAC_TF_2}"
-sed -i '' "s/${APP_ID_PLACEHOLDER_SNAKE}/${NEW_APP_ID_SNAKE}/g" "${APP_PROJECT_ROOT_DIR}/${MAC_TF_2}"
+sed -i.bak \
+  -e "s/${APP_ID_PLACEHOLDER_CAMEL}/${NEW_APP_ID_CAMEL}/g" \
+  -e "s/${APP_NAME_PLACEHOLDER}/${NEW_NAME}/g" \
+  "${APP_PROJECT_ROOT_DIR}/${MAC_TF_0}"
+rm -f "${APP_PROJECT_ROOT_DIR}/${MAC_TF_0}.bak"
+
+sed -i.bak "s/${APP_NAME_PLACEHOLDER}/${NEW_NAME}/g" "${APP_PROJECT_ROOT_DIR}/${MAC_TF_1}"
+rm -f "${APP_PROJECT_ROOT_DIR}/${MAC_TF_1}.bak"
+
+sed -i.bak \
+  -e "s/${APP_NAME_PLACEHOLDER}/${NEW_NAME}/g" \
+  -e "s/${APP_ID_PLACEHOLDER_SNAKE}/${NEW_APP_ID_SNAKE}/g" \
+  "${APP_PROJECT_ROOT_DIR}/${MAC_TF_2}"
+rm -f "${APP_PROJECT_ROOT_DIR}/${MAC_TF_2}.bak"
diff --git a/scripts/app_config/shared/update_version.sh b/scripts/app_config/shared/update_version.sh
index d056b9b738..11c1cbd8c9 100755
--- a/scripts/app_config/shared/update_version.sh
+++ b/scripts/app_config/shared/update_version.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -x -e
 
@@ -34,13 +34,10 @@ if [ ! -f "$PUBSPEC_FILE" ]; then
     exit 1
 fi
 
-if [[ "$(uname)" == 'Darwin' ]]; then
-  # macos specific sed
-  sed -i '' "s/PLACEHOLDER_V/$VERSION/g" "${PUBSPEC_FILE}"
-  sed -i '' "s/PLACEHOLDER_B/$BUILD_NUMBER/g" "${PUBSPEC_FILE}"
-else
-  sed -i "s/PLACEHOLDER_V/$VERSION/g" "${PUBSPEC_FILE}"
-  sed -i "s/PLACEHOLDER_B/$BUILD_NUMBER/g" "${PUBSPEC_FILE}"
-fi
+sed -i.bak \
+  -e "s/PLACEHOLDER_V/$VERSION/g" \
+  -e "s/PLACEHOLDER_B/$BUILD_NUMBER/g" \
+  "${PUBSPEC_FILE}"
+rm -f "${PUBSPEC_FILE}.bak"
 
 echo "Updated $PUBSPEC_FILE with version: $VERSION and build number: $BUILD_NUMBER"