diff --git a/README.md b/README.md
index 817b18c..404ba6f 100644
--- a/README.md
+++ b/README.md
@@ -31,13 +31,13 @@ return {
   summary        = "Short description",
   url            = "https://.../src.tar.gz",
   deps           = { "libfoo", "libbar>=2.0" },
-  build_system   = "autotools",       -- autotools | cmake | meson | make | cargo | custom
+  build_system   = "autotools",       -- autotools | cmake | meson | make | cargo | zig | build.sh | custom
   configure_args = { "--enable-x" },
   test           = "${DESTDIR}/usr/bin/mypkg --version",
 }
 ```
 
-**Build systems**: `autotools`, `cmake`, `meson`, `make`, `cargo`, `custom`
+**Build systems**: `autotools`, `cmake`, `meson`, `make`, `cargo`, `zig`, `build.sh`, `custom`
 
 ## Post-transaction hooks
 
diff --git a/toolchain/cli/zeta-cli b/toolchain/cli/zeta-cli
index 7a66045..1e89ad7 100755
--- a/toolchain/cli/zeta-cli
+++ b/toolchain/cli/zeta-cli
@@ -227,6 +227,8 @@ local function wizard()
     "meson      (meson setup build && ninja && ninja install)",
     "make       (make && make install)",
     "cargo      (cargo build --release)",
+    "zig        (zig build && zig build install --prefix /usr)",
+    "build.sh   (sh build.sh with DESTDIR staging)",
     "custom     (run build_script)",
   })
 
@@ -235,7 +237,7 @@ local function wizard()
 
   -- 8. Configure args (skip for cargo)
   rcp.configure_args = {}
-  if rcp.build_system ~= "cargo" then
+  if rcp.build_system ~= "cargo" and rcp.build_system ~= "build.sh" then
     io.write("Configure args" .. dim(" [comma-separated, e.g. --enable-feature, --without-x]") .. ": ")
     io.flush()
     local args_line = io.read("*l")
diff --git a/toolchain/examples/buildsh-demo/build.sh b/toolchain/examples/buildsh-demo/build.sh
new file mode 100644
index 0000000..4bf5918
--- /dev/null
+++ b/toolchain/examples/buildsh-demo/build.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+# build.sh — example build.sh-style build script for zeta-makepkg.
+#
+# Invoked from the extracted source directory.  The tool sets:
+#   $DESTDIR  → staging tree root (e.g. /tmp/zeta-makepkg/buildsh-tool-.../stage)
+#
+# This script must compile/assemble the software and install every output
+# file under $DESTDIR with standard FHS paths (usr/bin/, usr/lib/, etc.).
+#
+# For a real project you would replace the example below with the project's
+# own build.sh — e.g. one that runs configure && make && make install with
+# DESTDIR set, or any autotools-like shell build sequence.
+
+set -eu
+
+echo "==> Building buildsh-tool (build.sh)"
+
+# Example: install a shell script into the staging tree
+mkdir -p "$DESTDIR/usr/bin"
+cat > "$DESTDIR/usr/bin/buildsh-tool" <<'EOF'
+#!/bin/sh
+echo "buildsh-tool 1.0"
+EOF
+chmod 755 "$DESTDIR/usr/bin/buildsh-tool"
+
+echo "==> Install complete"
diff --git a/toolchain/examples/buildsh-demo/buildsh-demo.recipe b/toolchain/examples/buildsh-demo/buildsh-demo.recipe
new file mode 100644
index 0000000..5edaaa5
--- /dev/null
+++ b/toolchain/examples/buildsh-demo/buildsh-demo.recipe
@@ -0,0 +1,23 @@
+-- buildsh-demo.recipe — demonstrates build_system = "build.sh".
+--
+-- The build.sh build system runs the source tree's build.sh script from the
+-- extracted source directory. The script receives $DESTDIR pointing at the
+-- staging tree where installed files must be placed, exactly like the
+-- 'custom' build system — but the script name is fixed to build.sh.
+--
+-- To try this:
+--   1. Unpack the source tarball:  tar -xzf buildsh-tool-1.0.tar.gz
+--   2. Run the script manually:     cd buildsh-tool-1.0 && DESTDIR=/tmp/stage sh build.sh
+--   3. Inspect the staged output:   find /tmp/stage
+--   4. Build with makepkg:          zeta-makepkg buildsh-demo.recipe
+
+return {
+  name         = "buildsh-tool",
+  version      = "1.0",
+  summary      = "Example build.sh-style package (shell-installed binary)",
+  url          = "buildsh-tool-1.0.tar.gz",
+  sha256       = nil,
+  deps         = {},
+  build_system = "build.sh",
+  test         = "test -x ${DESTDIR}/usr/bin/buildsh-tool",
+}
diff --git a/toolchain/examples/zig.recipe b/toolchain/examples/zig.recipe
new file mode 100644
index 0000000..b843ea6
--- /dev/null
+++ b/toolchain/examples/zig.recipe
@@ -0,0 +1,16 @@
+-- zig.recipe — zig build system example.
+--
+-- Demonstrates: zig, configure_args (-D flags), source sha256.
+
+return {
+  name           = "my-zig-app",
+  version        = "1.0.0",
+  summary        = "An example application built with Zig",
+  url            = "https://example.com/my-zig-app-1.0.0.tar.gz",
+  sha256         = nil,
+  deps           = {},
+  build_system   = "zig",
+  configure_args = { "-Doptimize=ReleaseFast" },
+  test           = "test -x ${DESTDIR}/usr/bin/my-zig-app",
+  files          = { "usr/bin/my-zig-app" },
+}
diff --git a/toolchain/lib/builder.lua b/toolchain/lib/builder.lua
index 95019be..6617e8c 100644
--- a/toolchain/lib/builder.lua
+++ b/toolchain/lib/builder.lua
@@ -3,7 +3,7 @@
 -- Handles the full build pipeline for a recipe:
 --   1. fetch_source   — download to cache (or detect git)
 --   2. extract_source — unpack tarball or clone git repo
---   3. run_build      — dispatch autotools/cmake/meson/make/cargo/custom
+--   3. run_build      — dispatch autotools/cmake/meson/make/cargo/zig/build.sh/custom
 --   4. run_test       — execute post-build verification command
 --
 -- All subprocesses run in a minimal environment. Build tools (meson, cmake,
@@ -298,6 +298,16 @@ function builder.run_build(recipe, source_dir, stage_dir, opts)
     end
     run("install -D " .. path.quote(target) .. " " .. path.quote(path.join(bin_dir, path.basename(target))))
 
+  elseif bs == "zig" then
+    run("zig build -Doptimize=ReleaseSafe" .. args_str)
+    run("zig build install --prefix /usr -Ddestdir=" .. path.quote(stage_dir))
+
+  elseif bs == "build.sh" then
+    if not path.exists(path.join(source_dir, "build.sh")) then
+      error(("no build.sh script found in %s (build_system is 'build.sh')"):format(source_dir), 0)
+    end
+    run("DESTDIR=" .. path.quote(stage_dir) .. " sh build.sh")
+
   elseif bs == "custom" then
     local script = recipe.build_script
     run("DESTDIR=" .. path.quote(stage_dir) .. " sh " .. path.quote(script))
diff --git a/toolchain/lib/recipe.lua b/toolchain/lib/recipe.lua
index 137fcd6..11ab11c 100644
--- a/toolchain/lib/recipe.lua
+++ b/toolchain/lib/recipe.lua
@@ -11,7 +11,7 @@
 --     url          = "https://.../mypkg-1.2.3.tar.gz",
 --     sha256       = nil,            -- optional source checksum
 --     deps         = { "libfoo" },
---     build_system = "meson",       -- autotools | cmake | meson | make | cargo | custom
+--     build_system = "meson",       -- autotools | cmake | meson | make | cargo | zig | build.sh | custom
 --     configure_args = { ... },     -- optional extra args
 --     build_script  = "build.sh",   -- required for custom
 --     test         = "test -f ${DESTDIR}/usr/bin/mypkg",
@@ -31,7 +31,8 @@ local KNOWN_KEYS = {
 
 local BUILD_SYSTEMS = {
   autotools = true, cmake = true, meson = true,
-  make = true, cargo = true, custom = true,
+  make = true, cargo = true, zig = true,
+  ["build.sh"] = true, custom = true,
 }
 
 local HEX64 = "^" .. string.rep("%x", 64) .. "$"