diff --git a/src/cli.zig b/src/cli.zig
index 0699666d57..7144d821ef 100644
--- a/src/cli.zig
+++ b/src/cli.zig
@@ -1740,7 +1740,7 @@ pub const Command = struct {
 
                     if (extension.len > 0) {
                         if (strings.endsWithComptime(ctx.args.entry_points[0], ".sh")) {
-                            break :brk options.Loader.bunsh;
+                            break :brk .bunsh;
                         }
 
                         if (!ctx.debug.loaded_bunfig) {
@@ -1748,7 +1748,7 @@ pub const Command = struct {
                         }
 
                         if (ctx.preloads.len > 0)
-                            break :brk options.Loader.js;
+                            break :brk .js;
                     }
 
                     break :brk null;
@@ -1812,6 +1812,7 @@ pub const Command = struct {
     }
 
     fn maybeOpenWithBunJS(ctx: *Command.Context) bool {
+        const debug = bun.Output.scoped(.maybeOpenWithBunJS, false);
         if (ctx.args.entry_points.len == 0)
             return false;
 
@@ -1829,6 +1830,7 @@ pub const Command = struct {
                     if (comptime Environment.isWindows) {
                         resolved = resolve_path.normalizeString(resolved, true, .windows);
                     }
+                    debug("absolute path = {s}", .{resolved});
                     break :brk bun.openFile(
                         resolved,
                         .{ .mode = .read_only },
@@ -1839,7 +1841,7 @@ pub const Command = struct {
                         script_name_buf[file_path.len] = 0;
                         break :brk2 script_name_buf[0..file_path.len :0];
                     };
-
+                    debug("relative with dots file_path = {s}", .{file_pathZ});
                     break :brk bun.openFileZ(file_pathZ, .{ .mode = .read_only });
                 } else {
                     var path_buf: [bun.MAX_PATH_BYTES]u8 = undefined;
@@ -1852,6 +1854,7 @@ pub const Command = struct {
                         &parts,
                         .auto,
                     );
+                    debug("relative file_path = {s}", .{file_path});
                     if (file_path.len == 0) return false;
                     script_name_buf[file_path.len] = 0;
                     const file_pathZ = script_name_buf[0..file_path.len :0];
@@ -1891,11 +1894,7 @@ pub const Command = struct {
             ctx.*,
             absolute_script_path.?,
         ) catch |err| {
-            if (Output.enable_ansi_colors) {
-                ctx.log.printForLogLevelWithEnableAnsiColors(Output.errorWriter(), true) catch {};
-            } else {
-                ctx.log.printForLogLevelWithEnableAnsiColors(Output.errorWriter(), false) catch {};
-            }
+            ctx.log.printForLogLevel(Output.errorWriter()) catch {};
 
             Output.prettyErrorln("<r><red>error<r>: Failed to run <b>{s}<r> due to error <b>{s}<r>", .{
                 std.fs.path.basename(file_path),
diff --git a/src/cli/run_command.zig b/src/cli/run_command.zig
index ba99ca61a8..f9dc82c329 100644
--- a/src/cli/run_command.zig
+++ b/src/cli/run_command.zig
@@ -1483,6 +1483,7 @@ pub const RunCommand = struct {
         }
 
         if (path_for_which.len > 0) {
+            // TODO(@paperdave): double-check the PATH on windows is correct. there may be something incorrect here
             if (which(&path_buf, path_for_which, this_bundler.fs.top_level_dir, script_name_to_search)) |destination| {
                 const out = bun.asByteSlice(destination);
                 return try runBinaryWithoutBunxPath(
diff --git a/src/which.zig b/src/which.zig
index 7b214eefd6..dc10e8777e 100644
--- a/src/which.zig
+++ b/src/which.zig
@@ -15,6 +15,10 @@ fn isValid(buf: *bun.PathBuffer, segment: []const u8, bin: []const u8) ?u16 {
 // Like /usr/bin/which but without needing to exec a child process
 // Remember to resolve the symlink if necessary
 pub fn which(buf: *bun.PathBuffer, path: []const u8, cwd: []const u8, bin: []const u8) ?[:0]const u8 {
+    if (bin.len == 0) return null;
+    if (bun.strings.indexOfChar(bin, '/') != null) return null; // invalid exe. TODO: should be assertion?
+    if (bun.Environment.os == .windows and bun.strings.indexOfChar(bin, '\\') != null) return null; // invalid exe. TODO: should be assertion?
+
     if (bun.Environment.os == .windows) {
         var convert_buf: bun.WPathBuffer = undefined;
         const result = whichWin(&convert_buf, path, cwd, bin) orelse return null;
@@ -23,7 +27,6 @@ pub fn which(buf: *bun.PathBuffer, path: []const u8, cwd: []const u8, bin: []con
         std.debug.assert(result_converted.ptr == buf.ptr);
         return buf[0..result_converted.len :0];
     }
-    if (bin.len == 0) return null;
 
     // handle absolute paths
     if (std.fs.path.isAbsolute(bin)) {