fix dxc paths

Author: hazeycode

build.zig

@@ -163,10 +163,9 @@ pub const CompileShaders = struct {
     ) void {
         const b = self.step.owner;
 
-        const zwin32_path = comptime std.fs.path.dirname(@src().file) orelse ".";
         const dxc_path = switch (builtin.target.os.tag) {
-            .windows => zwin32_path ++ "/bin/x64/dxc.exe",
-            .linux => zwin32_path ++ "/bin/x64/dxc",
+            .windows => b.path("bin/x64/dxc.exe").getPath(b),
+            .linux => b.path("bin/x64/dxc").getPath(b),
             else => @panic("Unsupported target"),
         };
 
@@ -184,10 +183,7 @@ pub const CompileShaders = struct {
 
         const cmd_step = b.addSystemCommand(&dxc_command);
         if (builtin.target.os.tag == .linux) {
-            cmd_step.setEnvironmentVariable(
-                "LD_LIBRARY_PATH",
-                zwin32_path ++ "/bin/x64",
-            );
+            cmd_step.setEnvironmentVariable("LD_LIBRARY_PATH", b.path("bin/x64").getPath(b));
         }
         self.step.dependOn(&cmd_step.step);
     }