fixup! Add GitHub Action CI pipeline

test.d

@@ -104,33 +104,11 @@ string[] dubShellCommand(string[] subCommands ...)
         .array;
 }
 
-string defaultArchitecture()
-{
-    version (X86_64)
-        return "x86_64";
-    else
-    {
-        version (DigitalMars)
-            return "x86_mscoff";
-        else
-            return "x86";
-    }
-}
-
 string dubArch()
 {
-    version (Windows)
-    {
-        import std.process : environment;
-        import std.string : split;
+    import std.process : environment;
 
-        const architecture = environment
-            .get("DUB_ARCH", defaultArchitecture)
-            .split(" ")[$ - 1];
+    const arch = environment.get("DSTEP_TARGET_TRIPLE", "");
 
-        return "--arch=" ~ architecture;
-
-    }
-    else
-        return "";
+    return arch.length > 0 ? "--arch=" ~ arch : "";
 }