diff --git a/build.zig b/build.zig
index 231595afb..7d667db0d 100644
--- a/build.zig
+++ b/build.zig
@@ -329,7 +329,7 @@ pub fn build(b: *std.Build) !void {
         // Convert to termcap source format if thats helpful to people and
         // install it. The resulting value here is the termcap source in case
         // that is used for other commands.
-        {
+        if (!target.isWindows()) {
             const run_step = RunStep.create(b, "infotocap");
             run_step.addArg("infotocap");
             run_step.addFileSourceArg(src_source);
@@ -349,7 +349,7 @@ pub fn build(b: *std.Build) !void {
         }
 
         // Compile the terminfo source into a terminfo database
-        {
+        if (!target.isWindows()) {
             const run_step = RunStep.create(b, "tic");
             run_step.addArgs(&.{ "tic", "-x", "-o" });
             const path = run_step.addOutputFileArg("terminfo");
@@ -799,7 +799,11 @@ fn addDeps(
                 b,
                 step.target,
                 step.optimize,
-                .{ .lzma = false, .zlib = false },
+                .{
+                    .lzma = false,
+                    .zlib = false,
+                    .iconv = !step.target.isWindows(),
+                },
             );
             libxml2_lib.link(step);
 
diff --git a/pkg/fontconfig/build.zig b/pkg/fontconfig/build.zig
index 5f09408e2..b319cf45f 100644
--- a/pkg/fontconfig/build.zig
+++ b/pkg/fontconfig/build.zig
@@ -99,15 +99,9 @@ pub fn buildFontconfig(
         "-DHAVE_STDLIB_H",
         "-DHAVE_STRING_H",
         "-DHAVE_UNISTD_H",
-        "-DHAVE_SYS_STATVFS_H",
-        "-DHAVE_SYS_VFS_H",
-        "-DHAVE_SYS_STATFS_H",
         "-DHAVE_SYS_PARAM_H",
-        "-DHAVE_SYS_MOUNT_H",
 
-        "-DHAVE_LINK",
         "-DHAVE_MKSTEMP",
-        "-DHAVE_MKOSTEMP",
         "-DHAVE__MKTEMP_S",
         "-DHAVE_MKDTEMP",
         "-DHAVE_GETOPT",
@@ -115,15 +109,9 @@ pub fn buildFontconfig(
         //"-DHAVE_GETPROGNAME",
         //"-DHAVE_GETEXECNAME",
         "-DHAVE_RAND",
-        "-DHAVE_RANDOM",
-        "-DHAVE_LRAND48",
         //"-DHAVE_RANDOM_R",
-        "-DHAVE_RAND_R",
-        "-DHAVE_READLINK",
         "-DHAVE_FSTATVFS",
         "-DHAVE_FSTATFS",
-        "-DHAVE_LSTAT",
-        "-DHAVE_MMAP",
         "-DHAVE_VPRINTF",
 
         "-DHAVE_FT_GET_BDF_PROPERTY",
@@ -175,8 +163,27 @@ pub fn buildFontconfig(
         });
     }
 
-    if (!target.isWindows()) {
+    if (target.isWindows()) {
         try flags.appendSlice(&.{
+            "-DFC_CACHEDIR=\"LOCAL_APPDATA_FONTCONFIG_CACHE\"",
+            "-DFC_TEMPLATEDIR=\"c:/share/fontconfig/conf.avail\"",
+            "-DCONFIGDIR=\"c:/etc/fonts/conf.d\"",
+            "-DFC_DEFAULT_FONTS=\"\\t<dir>WINDOWSFONTDIR</dir>\\n\\t<dir>WINDOWSUSERFONTDIR</dir>\\n\"",
+        });
+    } else {
+        try flags.appendSlice(&.{
+            "-DHAVE_SYS_STATVFS_H",
+            "-DHAVE_SYS_VFS_H",
+            "-DHAVE_SYS_STATFS_H",
+            "-DHAVE_SYS_MOUNT_H",
+            "-DHAVE_LINK",
+            "-DHAVE_MKOSTEMP",
+            "-DHAVE_RANDOM",
+            "-DHAVE_LRAND48",
+            "-DHAVE_RAND_R",
+            "-DHAVE_READLINK",
+            "-DHAVE_LSTAT",
+            "-DHAVE_MMAP",
             "-DHAVE_PTHREAD",
 
             "-DFC_CACHEDIR=\"/var/cache/fontconfig\"",
diff --git a/pkg/freetype/build.zig b/pkg/freetype/build.zig
index add99b6ff..89534f10c 100644
--- a/pkg/freetype/build.zig
+++ b/pkg/freetype/build.zig
@@ -117,7 +117,6 @@ pub fn buildFreetype(
         .windows => {
             lib.addCSourceFiles(&.{
                 root ++ "builds/windows/ftdebug.c",
-                root ++ "src/base/ftver.c",
             }, flags.items);
         },
         else => lib.addCSourceFile(.{
diff --git a/pkg/harfbuzz/build.zig b/pkg/harfbuzz/build.zig
index 6d51156e5..1135ca322 100644
--- a/pkg/harfbuzz/build.zig
+++ b/pkg/harfbuzz/build.zig
@@ -81,13 +81,17 @@ pub fn buildHarfbuzz(
     defer flags.deinit();
 
     try flags.appendSlice(&.{
-        "-DHAVE_UNISTD_H",
-        "-DHAVE_SYS_MMAN_H",
         "-DHAVE_STDBOOL_H",
-
-        // We always have pthread
-        "-DHAVE_PTHREAD=1",
     });
+
+    if (!step.target.isWindows()) {
+        try flags.appendSlice(&.{
+            "-DHAVE_UNISTD_H",
+            "-DHAVE_SYS_MMAN_H",
+            "-DHAVE_PTHREAD=1",
+        });
+    }
+
     if (opt.freetype.enabled) try flags.appendSlice(&.{
         "-DHAVE_FREETYPE=1",
 
diff --git a/pkg/utf8proc/build.zig b/pkg/utf8proc/build.zig
index 675c79630..7152766d6 100644
--- a/pkg/utf8proc/build.zig
+++ b/pkg/utf8proc/build.zig
@@ -41,6 +41,7 @@ pub fn buildLib(
 
     // Compile
     var flags = std.ArrayList([]const u8).init(b.allocator);
+    try flags.append("-DUTF8PROC_EXPORTS");
     defer flags.deinit();
 
     // C files
diff --git a/src/Command.zig b/src/Command.zig
index 8fa8808a5..5daa2bcfe 100644
--- a/src/Command.zig
+++ b/src/Command.zig
@@ -122,6 +122,9 @@ pub fn start(self: *Command, alloc: Allocator) !void {
     else
         @compileError("missing env vars");
 
+    if (builtin.os.tag == .windows)
+        @panic("start not implemented on windows");
+
     // Fork
     const pid = try std.os.fork();
     if (pid != 0) {
@@ -187,6 +190,9 @@ fn setupFd(src: File.Handle, target: i32) !void {
 
 /// Wait for the command to exit and return information about how it exited.
 pub fn wait(self: Command, block: bool) !Exit {
+    if (builtin.os.tag == .windows)
+        @panic("wait not implemented on windows");
+
     const res = if (block) std.os.waitpid(self.pid.?, 0) else res: {
         // We specify NOHANG because its not our fault if the process we launch
         // for the tty doesn't properly waitpid its children. We don't want
@@ -255,7 +261,7 @@ pub fn expandPath(alloc: Allocator, cmd: []const u8) !?[]u8 {
         };
         defer f.close();
         const stat = try f.stat();
-        if (stat.kind != .directory and stat.mode & 0o0111 != 0) {
+        if (stat.kind != .directory and isExecutable(stat.mode)) {
             return try alloc.dupe(u8, full_path);
         }
     }
@@ -265,6 +271,11 @@ pub fn expandPath(alloc: Allocator, cmd: []const u8) !?[]u8 {
     return null;
 }
 
+fn isExecutable(mode: std.fs.File.Mode) bool {
+    if (builtin.os.tag == .windows) return true;
+    return mode & 0o0111 != 0;
+}
+
 test "expandPath: env" {
     const path = (try expandPath(testing.allocator, "env")).?;
     defer testing.allocator.free(path);
diff --git a/src/Pty.zig b/src/Pty.zig
index b8db3ee7c..7813e8880 100644
--- a/src/Pty.zig
+++ b/src/Pty.zig
@@ -13,6 +13,7 @@ const c = switch (builtin.os.tag) {
         @cInclude("sys/ioctl.h"); // ioctl and constants
         @cInclude("util.h"); // openpty()
     }),
+    .windows => { },
     else => @cImport({
         @cInclude("sys/ioctl.h"); // ioctl and constants
         @cInclude("pty.h");
@@ -45,6 +46,8 @@ slave: fd_t,
 
 /// Open a new PTY with the given initial size.
 pub fn open(size: winsize) !Pty {
+    if (builtin.os.tag == .windows) return error.NotImplementedOnWindows;
+
     // Need to copy so that it becomes non-const.
     var sizeCopy = size;
 
@@ -86,6 +89,8 @@ pub fn deinit(self: *Pty) void {
 
 /// Return the size of the pty.
 pub fn getSize(self: Pty) !winsize {
+    if (builtin.os.tag == .windows) return error.NotImplementedOnWindows;
+
     var ws: winsize = undefined;
     if (c.ioctl(self.master, TIOCGWINSZ, @intFromPtr(&ws)) < 0)
         return error.IoctlFailed;
@@ -95,6 +100,7 @@ pub fn getSize(self: Pty) !winsize {
 
 /// Set the size of the pty.
 pub fn setSize(self: Pty, size: winsize) !void {
+    if (builtin.os.tag == .windows) return error.NotImplementedOnWindows;
     if (c.ioctl(self.master, TIOCSWINSZ, @intFromPtr(&size)) < 0)
         return error.IoctlFailed;
 }
diff --git a/src/os/homedir.zig b/src/os/homedir.zig
index c16ff9489..d73405c09 100644
--- a/src/os/homedir.zig
+++ b/src/os/homedir.zig
@@ -13,6 +13,7 @@ const Error = error{
 pub inline fn home(buf: []u8) !?[]u8 {
     return switch (builtin.os.tag) {
         inline .linux, .macos => try homeUnix(buf),
+        .windows => try homeWindows(buf),
         else => @compileError("unimplemented"),
     };
 }
@@ -77,6 +78,36 @@ fn homeUnix(buf: []u8) !?[]u8 {
     return null;
 }
 
+fn homeWindows(buf: []u8) !?[]u8 {
+    const drive_len = blk: {
+        var fba_instance = std.heap.FixedBufferAllocator.init(buf);
+        const fba = fba_instance.allocator();
+        const drive = std.process.getEnvVarOwned(fba, "HOMEDRIVE") catch |err| switch (err) {
+            error.OutOfMemory => return Error.BufferTooSmall,
+            error.InvalidUtf8,
+            error.EnvironmentVariableNotFound => return null,
+        };
+        // could shift the contents if this ever happens
+        if (drive.ptr != buf.ptr) @panic("codebug");
+        break :blk drive.len;
+    };
+
+    const path_len = blk: {
+        const path_buf = buf[drive_len..];
+        var fba_instance = std.heap.FixedBufferAllocator.init(buf[drive_len..]);
+        const fba = fba_instance.allocator();
+        const homepath = std.process.getEnvVarOwned(fba, "HOMEPATH") catch |err| switch (err) {
+            error.OutOfMemory => return Error.BufferTooSmall,
+            error.InvalidUtf8,
+            error.EnvironmentVariableNotFound => return null,
+        };
+        // could shift the contents if this ever happens
+        if (homepath.ptr != path_buf.ptr) @panic("codebug");
+        break :blk homepath.len;
+    };
+    return buf[0 .. drive_len + path_len];
+}
+
 fn trimSpace(input: []const u8) []const u8 {
     return std.mem.trim(u8, input, " \n\t");
 }
diff --git a/src/os/passwd.zig b/src/os/passwd.zig
index 3b6a1eab7..8b5a9671c 100644
--- a/src/os/passwd.zig
+++ b/src/os/passwd.zig
@@ -15,7 +15,7 @@ comptime {
 }
 
 /// Used to determine the default shell and directory on Unixes.
-const c = @cImport({
+const c = if (builtin.os.tag == .windows) { } else @cImport({
     @cInclude("sys/types.h");
     @cInclude("unistd.h");
     @cInclude("pwd.h");
@@ -30,6 +30,8 @@ pub const Entry = struct {
 
 /// Get the passwd entry for the currently executing user.
 pub fn get(alloc: Allocator) !Entry {
+    if (builtin.os.tag == .windows) @panic("todo: windows");
+
     var buf: [1024]u8 = undefined;
     var pw: c.struct_passwd = undefined;
     var pw_ptr: ?*c.struct_passwd = null;