diff --git a/.gitignore b/.gitignore
index bc1869d..7786fbd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 .zed/
-out/
+out/p2601*
 thirdparty/blocksruntime
 thirdparty/zig*
 .DS_Store
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..c33e0ea
--- /dev/null
+++ b/README.md
@@ -0,0 +1,12 @@
+# Huh
+
+Quick test to see how easy it easy to have a fully self-contained repository that bootstraps its build process.
+
+# Requirements
+
+[PowerShell](https://github.com/PowerShell/PowerShell/releases/tag/v7.5.4) (>= 7.5.4)
+
+# Building
+
+Run `pwsh do.ps1` to see a list of commands.
+Run `pwsh do.ps1 run` to bootstrap, compile, and run the resulting program.
diff --git a/compile_flags.txt b/compile_flags.txt
new file mode 100644
index 0000000..ff52938
--- /dev/null
+++ b/compile_flags.txt
@@ -0,0 +1,9 @@
+-I./src
+-I./thirdparty/
+-I./thirdparty/blocksruntime/BlocksRuntime/
+-I./thirdparty/blocksruntime/
+--std=c2x
+-fblocks
+
+-xobjective-c
+-DPLATFORM_MACOS -DCHANGE_THESE_LINES_IF_YOURE_ON_A_DIFFERENT_PLATFORM
diff --git a/do.ps1 b/do.ps1
new file mode 100755
index 0000000..bb520f7
--- /dev/null
+++ b/do.ps1
@@ -0,0 +1,192 @@
+#!/usr/bin/env pwsh
+$ErrorActionPreference = "Stop";
+
+$HOST_OS = &{
+   if ($IsWindows) {
+      "windows"
+   } elseif ($IsMacOS) {
+      "macos";
+   } elseif ($IsLinux) {
+      "linux";
+   } else {
+      Write-Error "Unsupported host operating system";
+   }
+};
+
+$HOST_ARCH = &{
+   switch ([System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture) {
+      "X86"   { "x86" }
+      "X64"   { "x86_64" }
+      "Arm"   { "arm" }
+      "Arm64" { "aarch64" }
+      default { Write-Error "Unsupported host architecture"; }
+   }
+}
+
+$OUT_DIR  = "out";
+$DEPS_DIR = "thirdparty";
+$EXE_NAME = "p2601";
+
+function Get-Ext($platform) {
+   if ($platform -eq "windows") { return ".exe"; }
+   return "";
+}
+
+$ZIG_VERSION = "0.15.2";
+$ZIG_SLUG    = "zig-${HOST_ARCH}-${HOST_OS}-${ZIG_VERSION}";
+$ZIG_DIR     = Join-Path $DEPS_DIR $ZIG_SLUG
+$ZIG         = Join-Path $ZIG_DIR "zig$(Get-Ext $HOST_OS)"
+
+$BLOCKS_RT_REPO   = "https://github.com/mackyle/blocksruntime.git";
+$BLOCKS_RT_DIR    = Join-Path $DEPS_DIR "blocksruntime";
+$BLOCKS_RT_FLAGS  = "-I$BLOCKS_RT_DIR -I$(Join-Path $BLOCKS_RT_DIR "BlocksRuntime")";
+$BLOCKS_RT_SOURCE = (Join-Path $BLOCKS_RT_DIR "BlocksRuntime" "runtime.c") + " " + (Join-Path $BLOCKS_RT_DIR "BlocksRuntime" "data.c");
+
+$C_SOURCE      = "src/main.c";
+$C_INCLUDES    = "-Isrc -I$DEPS_DIR";
+$C_FLAGS       = "-std=c23 -fblocks -g $C_INCLUDES";
+$RELEASE_FLAGS = "-Ofast -Wno-everything -ffast-math";
+
+$WINDOWS_FLAGS = "-ld3d11 -lgdi32";
+$MACOS_FLAGS   = "-x objective-c -lobjc -framework Foundation -framework Cocoa -framework CoreFoundation -framework CoreGraphics -framework QuartzCore -framework Metal -framework MetalKit";
+$LINUX_FLAGS   = "-lgl";
+
+
+# try vendoring zig
+if (-not (Test-Path $ZIG)) {
+   $zig_ext = "";
+   if ($IsWindows) {
+      $zig_ext = ".zip";
+   } else {
+      $zig_ext = ".tar.xz";
+   }
+
+   $zig_url = "https://ziglang.org/download/$ZIG_VERSION/$ZIG_SLUG$ZIG_EXT";
+   Write-Host ":: Downloading Zig $ZIG_VERSION ($HOST_OS/$HOST_ARCH)";
+   Write-Host $zig_url;
+
+   if ($IsWindows) {
+      $tmp = Join-Path $DEPS_DIR "zig-compiler$zig_ext";
+      Invoke-WebRequest -Uri $zig_url -OutFile $tmp -UseBasicParsing
+      Expand-Archive -Path $tmp -DestinationPath $DEPS_DIR -Force
+      Remove-Item $tmp
+   } else {
+      curl -sSfL $zig_url | tar -xJ -C $DEPS_DIR
+   }
+}
+# try vendoring blocks runtime
+if (-not (Test-Path $BLOCKS_RT_DIR)) {
+   Write-Host ":: Cloning libBlocksRuntime";
+   git clone --depth 1 $BLOCKS_RT_REPO $BLOCKS_RT_DIR
+}
+
+# ensure the out directory exists
+New-Item -ItemType Directory -Force -Path $OUT_DIR | Out-Null;
+
+
+# ...............
+
+function Get-Flags($os, $release) {
+   $flags = $C_FLAGS;
+   switch ($os) {
+      "windows" {
+         $flags += " $WINDOWS_FLAGS $BLOCKS_RT_FLAGS -DPLATFORM_WINDOWS";
+      }
+      "macos" {
+         $flags += " $MACOS_FLAGS -DPLATFORM_MACOS";
+      }
+      "linux" {
+         $flags += " $LINUX_FLAGS $BLOCKS_RT_FLAGS -DPLATFORM_LINUX";
+      }
+      default {
+         Write-Error "Unsupported operating system '$os'";
+      }
+   }
+
+   if ($release) {
+      $flags += " $RELEASE_FLAGS";
+   }
+
+   return $flags;
+}
+
+function Get-Source($os) {
+   $source = $C_SOURCE;
+   switch ($os) {
+      "macos" {
+         # Do nothing here since macos already supports the blocks runtime
+         # and our local copy conflicts with the one shipped.
+      }
+      "windows" {
+         $source += " $BLOCKS_RT_SOURCE";
+      }
+      "linux" {
+         $source += " $BLOCKS_RT_SOURCE";
+      }
+      default {
+         Write-Error "Unsupported operating system '$os'";
+      }
+   }
+   return $source;
+}
+
+function CompileCommand($target_os, $release) {
+   return "$ZIG cc $(Get-Flags $target_os $release) $(Get-Source $target_os)";
+}
+
+# ..............
+
+$command = $args[0];
+$rest    = $args[1..($args.Length-1)];
+switch ($command) {
+   {($_ -eq "build") -or ($_ -eq "b")} {
+      $release = $rest[0] -eq "release" -or $rest[0] -eq "fast";
+      $cmd     = "$(CompileCommand $HOST_OS $release) -o $(Join-Path $OUT_DIR $($EXE_NAME + (Get-Ext $HOST_OS)))";
+
+      Write-Host (":: Compiling natively" + $(if ($release) { " (release mode)" } else { "" }));
+      Write-Host $cmd;
+      Invoke-Expression $cmd | Write-Host;
+   }
+   {($_ -eq "build-cross") -or ($_ -eq "bc")} {
+      $target  = $rest[0];
+      $rest    = $rest[1..($rest.Length-1)];
+      $release = $rest[0] -eq "release" -or $rest[0] -eq "fast";
+
+      $target_os = ($target -split "-")[1];
+      if ($null -eq $target_os) {
+         Write-Error "Unsupported target '$target' - run list-targets to see possible targets";
+      }
+
+      $cmd = "$(CompileCommand $target_os $release) --target=$target -o $(Join-Path $OUT_DIR $($EXE_NAME + (Get-Ext $target_os)))";
+
+      Write-Host (":: Cross-compiling for $target" + $(if ($release) { " (release mode)" } else { "" }));
+      Write-Host $cmd;
+      Invoke-Expression $cmd | Write-Host;
+   }
+   {($_ -eq "run") -or ($_ -eq "r")} {
+      $release = $rest[0] -eq "release" -or $rest[0] -eq "fast";
+      $binary  = Join-Path $OUT_DIR ($EXE_NAME + (Get-Ext $HOST_OS));
+      $cmd     = "$(CompileCommand $HOST_OS $release) -o $binary";
+
+      Write-Host (":: Compiling natively" + $(if ($release) { " (release mode)" } else { "" }));
+      Write-Host $cmd;
+      Invoke-Expression $cmd | Write-Host;
+      Invoke-Expression $binary | Write-Host;
+   }
+   {($_ -eq "list-targets") -or ($_ -eq "lt")} {
+      # zig target doesn't actually output json...
+      Write-Host ":: Available cross-compilation targets";
+      Write-Host "   x86_64-windows-gnu";
+      Write-Host "   x86_64-linux-gnu";
+      Write-Host "   wasm32-wasi";
+      Write-Host "   wasm32-freestanding";
+   }
+   default {
+      Write-Host ":: Available things to do";
+      Write-Host "   build (b)                 compiles the program natively";
+      Write-Host "   build-cross (bc) <target> cross-compiles the program for the target triple (ex. x86_64-windows-gnu)";
+      Write-Host "   run (r)                   compiles and runs the native program";
+      Write-Host "   list-targets (lt)         lists all cross-compliation targets";
+      return;
+   }
+}
diff --git a/justfile b/justfile
deleted file mode 100644
index 6a1fd52..0000000
--- a/justfile
+++ /dev/null
@@ -1,146 +0,0 @@
-set windows-shell := ["powershell.exe", "-NoLogo", "-Command"]
-set shell         := ["bash", "-cu"]
-
-# configuration
-project    := "p2601"
-out_dir    := "out"
-thirdparty := "thirdparty"
-
-# platform-specific
-host_os   := if os() == "macos" { "macos" } else { os() }
-host_arch := arch()
-exe       := if os() == "windows" { ".exe" } else { "" }
-
-# zig stuff
-zig_version := "0.15.2"
-zig_slug    := "zig-" + host_arch + "-" + host_os + "-" + zig_version
-zig_dir     := thirdparty / zig_slug
-zig         := zig_dir / ("zig" + exe)
-zig_ext     := if os() == "windows" { "zip" } else { "tar.xz" }
-zig_url     := "https://ziglang.org/download/" + zig_version + "/" + zig_slug + "." + zig_ext
-
-# blocks runtime
-blocks_dir     := thirdparty / "blocksruntime"
-blocks_repo    := "https://github.com/mackyle/blocksruntime.git"
-# use the real blocks runtime if we're on mac
-blocks_include := if os() == "macos" { "" } else { "-I" + blocks_dir / "BlocksRuntime" + " -I" + blocks_dir }
-blocks_src     := if os() == "macos" { "" } else { blocks_dir / "BlocksRuntime" / "runtime.c" + " " + blocks_dir / "BlocksRuntime" / "data.c" }
-
-# cflags
-winflags := if os() == "windows" { "-ld3d11 -lgdi32" } else { "" }
-macflags := if os() == "macos" { "-x objective-c -lobjc -framework Foundation -framework Cocoa -framework CoreFoundation -framework CoreGraphics -framework QuartzCore -framework Metal -framework MetalKit" } else { "" }
-lnxflags := if os() == "linux" { "" } else { "" }
-allflags := macflags + winflags + lnxflags
-
-csrc   := "src/main.c" + " " + blocks_src
-cinc   := "-Isrc -Ithirdparty " + blocks_include
-cflags := "-std=c23 -fblocks -g " + cinc
-
-
-
-# how the hotdog is made
-# ----------------------
-
-# platform-specific vendoring
-
-[unix]
-[private]
-vendor-zig:
-    #!/usr/bin/env bash
-    set -euo pipefail
-    [[ -x "{{zig}}" ]] && exit 0
-    echo ":: Downloading Zig {{zig_version}} ({{host_os}}/{{host_arch}})…"
-    echo {{zig_url}}
-    mkdir -p "{{thirdparty}}"
-    curl -sSfL "{{zig_url}}" | tar -xJ -C "{{thirdparty}}"
-
-[windows]
-[private]
-vendor-zig:
-    #!powershell.exe
-    if (Test-Path "{{zig}}") { exit 0 }
-    Write-Host ":: Downloading Zig {{zig_version}} ({{host_os}}/{{host_arch}})..."
-    New-Item -ItemType Directory -Force -Path "{{thirdparty}}" | Out-Null
-    $tmp = Join-Path $env:TEMP "zig-vendor.zip"
-    Invoke-WebRequest -Uri "{{zig_url}}" -OutFile $tmp -UseBasicParsing
-    Expand-Archive -Path $tmp -DestinationPath "{{thirdparty}}" -Force
-    Remove-Item $tmp
-
-[unix]
-[private]
-vendor-blocks:
-    #!/usr/bin/env bash
-    set -euo pipefail
-    [[ -d "{{blocks_dir}}" ]] && exit 0
-    echo ":: Cloning libBlocksRuntime…"
-    git clone --depth 1 "{{blocks_repo}}" "{{blocks_dir}}"
-
-[windows]
-[private]
-vendor-blocks:
-    #!powershell.exe
-    if (Test-Path "{{blocks_dir}}") { exit 0 }
-    Write-Host ":: Cloning libBlocksRuntime..."
-    git clone --depth 1 "{{blocks_repo}}" "{{blocks_dir}}"
-
-[doc("Pull in unversioned thirdparty dependencies")]
-vendor: vendor-zig vendor-blocks
-
-# building/running
-
-[unix]
-[private]
-_mkout:
-    @mkdir -p "{{out_dir}}"
-
-[windows]
-[private]
-_mkout:
-    @New-Item -ItemType Directory -Force -Path "{{out_dir}}" | Out-Null
-
-[doc("Compile natively (debug)")]
-[default]
-build: vendor _mkout
-    {{zig}} cc {{cflags}} {{allflags}} {{csrc}} {{blocks_include}} -o {{out_dir}}/{{project}}{{exe}}
-
-[doc("Compile natively with optimizations")]
-build-release: vendor _mkout
-    {{zig}} cc {{cflags}} {{allflags}} -Ofast -Wno-everything -ffast-math -DNDEBUG {{csrc}} {{blocks_include}} -o {{out_dir}}/{{project}}{{exe}}
-
-[doc("Compile for wasm32-wasi")]
-build-wasm: vendor _mkout
-    {{zig}} cc {{cflags}} {{allflags}} -target wasm32-wasi {{csrc}} {{blocks_include}} -o {{out_dir}}/{{project}}.wasm
-
-[doc("Cross-compile for a Zig target triple (e.g. aarch64-linux-gnu)")]
-build-cross target *args: vendor _mkout
-    {{zig}} cc {{cflags}} -target {{target}} {{csrc}} {{blocks_include}} -o {{out_dir}}/{{project}}-{{target}} {{args}}
-
-[doc("Build and run natively")]
-run *args: build
-    @./{{out_dir}}/{{project}}{{exe}} {{args}}
-
-[doc("Build for wasm32-wasi and run via Wasmer")]
-run-wasm *args: build-wasm
-    @wasmer run {{out_dir}}/{{project}}.wasm -- {{args}}
-
-# extras
-
-[doc("List Zig cross-compilation targets")]
-list-targets: vendor-zig
-    {{zig}} targets
-
-[doc("List available just commands")]
-list:
-    @just --list
-
-[doc("Remove build artifacts")]
-[unix]
-[confirm]
-@clean:
-    rm -rf {{out_dir}}
-
-[doc("Remove build artifacts")]
-[windows]
-[confirm]
-clean:
-    if (Test-Path "{{out_dir}}") { Remove-Item -Recurse -Force "{{out_dir}}" }
diff --git a/out/.do_not_delete b/out/.do_not_delete
new file mode 100644
index 0000000..e69de29
diff --git a/src/main.c b/src/main.c
index 04e5f7a..9080e2c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -4,10 +4,14 @@
 #define SOKOL_IMPL
 #define SOKOL_NO_ENTRY
 
-#ifdef __APPLE__
-#define SOKOL_METAL
+#ifdef PLATFORM_WINDOWS
+   #define SOKOL_D3D11
+#elifdef PLATFORM_MACOS
+   #define SOKOL_METAL
+#elifdef PLATFORM_LINUX
+   #define SOKOL_GLES3
 #else
-#define SOKOL_D3D11
+   #error "unsupported platform"
 #endif
 
 #include "sokol/sokol_app.h"