diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 4fdb85c..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,6 +0,0 @@
-[submodule "lib/zig-clap"]
-	path = lib/zig-clap
-	url = git@github.com:Hejsil/zig-clap.git
-[submodule "lib/zig-csv"]
-	path = lib/zig-csv
-	url = git@github.com:beho/zig-csv.git
diff --git a/README.md b/README.md
index f218912..2db12bd 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ $ head -n /tmp/1mil.json
 Download the latest release from the [releases](https://github.com/knadh/csv2json/releases) page.
 
 Or, to compile with Zig (tested with v0.11.0):
-- `git clone --recursive git@github.com:knadh/csv2json.git`
+- `git clone git@github.com:knadh/csv2json.git`
 - `cd csv2json && zig build`
 - The binary will be in `zig-out/bin`
 
diff --git a/build.zig b/build.zig
index 0b43f64..efdcda5 100644
--- a/build.zig
+++ b/build.zig
@@ -1,14 +1,6 @@
 const std = @import("std");
 
-pub const clap_module = std.Build.CreateModuleOptions{
-    .source_file = .{ .path = "lib/zig-clap/clap.zig" },
-};
-
-pub const csv_module = std.Build.CreateModuleOptions{
-    .source_file = .{ .path = "lib/zig-csv/src/main.zig" },
-};
-
-pub fn build(b: *std.build) void {
+pub fn build(b: *std.Build) void {
     // Standard target options allows the person running `zig build` to choose
     // what target to build for. Here we do not override the defaults, which
     // means any target is allowed, and the default is native. Other options
@@ -23,8 +15,10 @@ pub fn build(b: *std.build) void {
         .optimize = optimize,
     });
 
-    exe.addAnonymousModule("clap", clap_module);
-    exe.addAnonymousModule("csv", csv_module);
+    const dep_curl = b.dependency("clap", .{});
+    exe.root_module.addImport("clap", dep_curl.module("clap"));
+    const dep_csv = b.dependency("zig-csv", .{});
+    exe.root_module.addImport("csv", dep_csv.module("zig-csv"));
 
     b.installArtifact(exe);
 
diff --git a/build.zig.zon b/build.zig.zon
new file mode 100644
index 0000000..1c3d8cc
--- /dev/null
+++ b/build.zig.zon
@@ -0,0 +1,40 @@
+.{
+    .name = "csv2json",
+    // This is a [Semantic Version](https://semver.org/).
+    // In a future version of Zig it will be used for package deduplication.
+    .version = "0.0.0",
+
+    // This field is optional.
+    // This is currently advisory only; Zig does not yet do anything
+    // with this value.
+    //.minimum_zig_version = "0.11.0",
+
+    // This field is optional.
+    // Each dependency must either provide a `url` and `hash`, or a `path`.
+    // `zig build --fetch` can be used to fetch all dependencies of a package, recursively.
+    // Once all dependencies are fetched, `zig build` no longer requires
+    // internet connectivity.
+    .dependencies = .{
+        .@"zig-csv" = .{
+            .url = "https://github.com/rofrol/beho--zig-csv/archive/c8bbbeb894ef6835a4c0341fc2326b476a3e86d4.tar.gz",
+            .hash = "1220f2a95848b5edaaf04bf6a32797ae05d39a5640a3384b3b40681f2931ea3698e7",
+        },
+        .clap = .{
+            .url = "https://github.com/Hejsil/zig-clap/archive/209ba4da76e46412acfe18f711cb0b041ff37f10.tar.gz",
+            .hash = "12200103e7b4a0cb162f2912df4fe97914024a25b5c9fcce6ea4119744f3f2a7f24e",
+        },
+    },
+    .paths = .{
+        // This makes *all* files, recursively, included in this package. It is generally
+        // better to explicitly list the files and directories instead, to insure that
+        // fetching from tarballs, file system paths, and version control all result
+        // in the same contents hash.
+        "",
+        // For example...
+        //"build.zig",
+        //"build.zig.zon",
+        //"src",
+        //"LICENSE",
+        //"README.md",
+    },
+}
diff --git a/lib/zig-clap b/lib/zig-clap
deleted file mode 160000
index f49b947..0000000
--- a/lib/zig-clap
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit f49b94700e0761b7514abdca0e4f0e7f3f938a93
diff --git a/lib/zig-csv b/lib/zig-csv
deleted file mode 160000
index 72f9a41..0000000
--- a/lib/zig-csv
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 72f9a41d4d24f6d5cc0333b85d5c45cebce10848
diff --git a/src/converter.zig b/src/converter.zig
index 71395fc..b2051bc 100644
--- a/src/converter.zig
+++ b/src/converter.zig
@@ -15,7 +15,7 @@ pub const Converter = struct {
 
     // Initialize the converter.
     pub fn init(allocator: std.mem.Allocator, writer: anytype, rowBufSize: u32) !Self {
-        var s = Converter{
+        const s = Converter{
             .allocator = allocator,
             .out = std.io.bufferedWriter(writer),
             .csvBuf = try allocator.alloc(u8, rowBufSize),
@@ -54,11 +54,11 @@ pub const Converter = struct {
                     if (isFirst) {
                         // Copy all the fields in the first row to a separate buffer
                         // to be retained throughout the lifetime of the program.
-                        std.mem.copy(u8, self.hdrBuf[f..ln], val);
+                        std.mem.copyForwards(u8, self.hdrBuf[f..ln], val);
                         try fields.append(self.hdrBuf[f..ln]);
                     } else {
                         // Row buffer can be discarded after processing each individual row.
-                        std.mem.copy(u8, self.rowBuf[f..ln], val);
+                        std.mem.copyForwards(u8, self.rowBuf[f..ln], val);
                         try fields.append(self.rowBuf[f..ln]);
                     }
 
diff --git a/src/main.zig b/src/main.zig
index 1f03ca0..63be45a 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -44,6 +44,9 @@ pub fn printStats(start: u64, end: u64, lines: u64) void {
 }
 
 pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+
     const params = comptime clap.parseParamsComptime(
         \\ -h, --help
         \\         Display this help and exit.
@@ -59,19 +62,21 @@ pub fn main() !void {
     };
 
     // Help / usage.
-    var args = clap.parse(clap.Help, &params, parsers, .{}) catch |err| {
+    var args = clap.parse(clap.Help, &params, parsers, .{
+        .allocator = gpa.allocator(),
+    }) catch |err| {
         std.debug.print("Invalid flags: {s}\n\n", .{@errorName(err)});
         try printHelp(&params);
-        std.os.exit(1);
+        std.process.exit(1);
     };
     defer args.deinit();
 
     if (args.args.help != 0) {
         try printHelp(&params);
-        std.os.exit(1);
+        std.process.exit(1);
     }
 
-    var bufSize: u32 = 4096;
+    const bufSize: u32 = 4096;
     if (args.args.buf) |b|
         std.debug.print("Buffer size: {d}\n", .{b});
 
@@ -84,14 +89,14 @@ pub fn main() !void {
         var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
         defer arena.deinit();
 
-        var allocator = arena.allocator();
+        const allocator = arena.allocator();
 
         var conv = try Converter.init(allocator, std.io.getStdOut().writer(), bufSize);
 
         const lines = try conv.convert(fPath);
 
         printStats(start, timer.read(), lines);
-        std.os.exit(0);
+        std.process.exit(0);
     }
 
     // No flags.