build libvmx and adjust build script

Trying to make a new build location, but not sure how that works.
Can't get libvmx to be copied over for the other dependencies

build.zig

@@ -1,3 +1,14 @@
+//
+// Omtoy build script
+//
+// Build required OMT parts and link against our code
+//
+// Run `zig build build-omt` to build dependencies before anything else.
+//
+// TODO: I don't know if libvmx needs to be in the same directory as libomt _for libomt.so_
+//       or for the final executables. Right now I just move it next to libomt which is also
+//       passed as libLibrary for the executables
+// TODO: Use install commands to move the libomt artifacts to a more sensible place
 const std = @import("std");
 
 pub fn build(b: *std.Build) void {
@@ -7,23 +18,36 @@ pub fn build(b: *std.Build) void {
     const triple = target.result;
     if (triple.os.tag != .linux or triple.cpu.arch != .x86_64) {
         std.log.warn("The build file only supports Linux x86-64 right now.\n", .{});
-        std.log.warn("You can extend the build.zig to call the appropriate platform scripts in 3rd/libomtnet/build/ and 3rd/libomt/build.\n", .{});
+        std.log.warn(
+            "You can extend the build.zig to call the appropriate platform scripts " ++
+                "in 3rd/libomtnet/build/ and 3rd/libomt/build.\n",
+            .{},
+        );
     }
 
     // Build libomtnet
-    const libomtnet_build = b.addSystemCommand(&.{
+    const libomtnet_build = b.addSystemCommand(&.{"bash"});
-        "bash",
-        "buildall.sh",
-    });
     libomtnet_build.cwd = b.path("3rd/libomtnet/build");
+    libomtnet_build.addFileArg(b.path("3rd/libomtnet/build/buildall.sh"));
 
     // Build libomt
-    const libomt_build = b.addSystemCommand(&.{
+    const libomt_build = b.addSystemCommand(&.{"bash"});
-        "bash",
-        "buildlinuxx64.sh",
-    });
     libomt_build.cwd = b.path("3rd/libomt/build");
+    libomt_build.addFileArg(b.path("3rd/libomt/build/buildlinuxx64.sh"));
     libomt_build.step.dependOn(&libomtnet_build.step);
+    // TODO: install libomt.so and libomt.h in a more convenient location
+
+    // Build libvmx
+    const libvmx_build = b.addSystemCommand(&.{"bash"});
+    libvmx_build.addFileArg(b.path("3rd/libvmx/build/buildlinuxx64.sh"));
+    libvmx_build.cwd = b.path("3rd/libvmx/build");
+
+    // Copy libvmx to a place of happiness
+    // TODO: Runs but doesn't do what I'd expect it to. What's going on?
+    const libvmx_copy = b.addSystemCommand(&.{"cp"});
+    libvmx_copy.addFileArg(b.path("3rd/libvmx/build/libvmx.so"));
+    _ = libvmx_copy.addOutputFileArg("3rd/libomt/bin/Release/net8.0/linux-x64/publish/");
+    libvmx_copy.step.dependOn(&libvmx_build.step);
 
     // Define executable
     const sender_exe = b.addExecutable(.{
@@ -60,19 +84,10 @@ pub fn build(b: *std.Build) void {
     b.installArtifact(sender_exe);
     b.installArtifact(receiver_exe);
 
-    // Link libomt with the receiver
-    {
-        const omt_output_dir = b.path("3rd/libomt/bin/Release/net8.0/linux-x64/publish");
-        // exe.step.dependOn(&libomt_build.step);
-        sender_exe.addIncludePath(omt_output_dir);
-        sender_exe.addLibraryPath(omt_output_dir);
-        sender_exe.linkSystemLibrary("omt");
-        sender_exe.linkLibC();
-    }
-
     // Manual build step for libomt dependencies
     const build_omt_step = b.step("build-omt", "Build libomt and libomtnet");
     build_omt_step.dependOn(&libomt_build.step);
+    build_omt_step.dependOn(&libvmx_copy.step);
 
     // Add run step for sender
     const run_sender_step = b.step("sender-run", "Run the sender client");