diff --git a/projects/freebsd/ecode/build.app.sh b/projects/freebsd/ecode/build.app.sh
index dafaa91ac..ef7034492 100755
--- a/projects/freebsd/ecode/build.app.sh
+++ b/projects/freebsd/ecode/build.app.sh
@@ -31,9 +31,31 @@ while [ $# -gt 0 ]; do
     shift
 done
 
-premake5 --with-text-shaper gmake || exit
+CONFIG_NAME=
+if command -v premake5 &> /dev/null
+then
+    premake5 --with-text-shaper gmake || exit
+    CONFIG_NAME=release_x86_64
+elif command -v premake4 &> /dev/null
+then
+    premake4 --with-text-shaper gmake || exit
+    CONFIG_NAME=release
+else
+    echo "Neither premake5 nor premake4 is available. Please install one."
+    exit 1
+fi
+
 cd make/bsd || exit
-gmake -j"$(nproc)" config=release_x86_64 ecode || exit
+
+if command -v nproc &> /dev/null # nproc is only available on FreeBSD 13.2 and later
+then
+  parallel_tasks=$(nproc)
+else
+  parallel_tasks=$(getconf NPROCESSORS_ONLN 2>/dev/null || sysctl -n hw.ncpu)
+  # the former is the number of online cpus, the later is the total number of cpus
+fi
+gmake -j"${parallel_tasks}" config="${CONFIG_NAME}" ecode || exit
+
 cd "$DIRPATH" || exit
 rm -rf ./ecode.app
 mkdir -p ecode.app/assets
diff --git a/projects/scripts/patch_commit_number.sh b/projects/scripts/patch_commit_number.sh
index 395e18cbb..2079c0987 100644
--- a/projects/scripts/patch_commit_number.sh
+++ b/projects/scripts/patch_commit_number.sh
@@ -6,8 +6,14 @@ COMMIT_NUMBER=$(git rev-list "$(git tag --sort=-creatordate | grep ecode | sed -
 
 FILE_PATH="../../src/tools/ecode/version.hpp"
 
-if [[ "$OSTYPE" == "darwin"* || "$OSTYPE" == "freebsd"* ]]; then
+case "$OSTYPE" in
+  darwin*)
     perl -i -pe "s/#define ECODE_COMMIT_NUMBER [0-9]+/#define ECODE_COMMIT_NUMBER $COMMIT_NUMBER/" "$FILE_PATH"
-else
+    ;;
+  freebsd*|openbsd*|netbsd*|dragonfly*|solaris*)
+    gsed -i "s/#define ECODE_COMMIT_NUMBER [0-9]\+/#define ECODE_COMMIT_NUMBER $COMMIT_NUMBER/" "$FILE_PATH"
+    ;;
+  *)
     sed -i "s/#define ECODE_COMMIT_NUMBER [0-9]\+/#define ECODE_COMMIT_NUMBER $COMMIT_NUMBER/" "$FILE_PATH"
-fi
+    ;;
+esac