diff --git a/src/bun.zig b/src/bun.zig
index f468a7d7a8..73814b39b2 100644
--- a/src/bun.zig
+++ b/src/bun.zig
@@ -773,7 +773,7 @@ pub fn openDir(dir: std.fs.Dir, path_: [:0]const u8) !std.fs.IterableDir {
         const res = try sys.openDirAtWindowsA(toFD(dir.fd), path_, true, false).unwrap();
         return std.fs.IterableDir{ .dir = .{ .fd = fdcast(res) } };
     } else {
-        const fd = try sys.openat(dir.fd, path_, std.os.O.DIRECTORY | std.os.O.CLOEXEC | 0, 0).unwrap();
+        const fd = try sys.openat(dir.fd, path_, std.os.O.DIRECTORY | std.os.O.CLOEXEC | std.os.O.RDONLY, 0).unwrap();
         return std.fs.IterableDir{ .dir = .{ .fd = fd } };
     }
 }
@@ -783,7 +783,7 @@ pub fn openDirA(dir: std.fs.Dir, path_: []const u8) !std.fs.IterableDir {
         const res = try sys.openDirAtWindowsA(toFD(dir.fd), path_, true, false).unwrap();
         return std.fs.IterableDir{ .dir = .{ .fd = fdcast(res) } };
     } else {
-        const fd = try sys.openatA(dir.fd, path_, std.os.O.DIRECTORY | std.os.O.CLOEXEC | 0, 0).unwrap();
+        const fd = try sys.openatA(dir.fd, path_, std.os.O.DIRECTORY | std.os.O.CLOEXEC | std.os.O.RDONLY, 0).unwrap();
         return std.fs.IterableDir{ .dir = .{ .fd = fd } };
     }
 }
@@ -793,7 +793,7 @@ pub fn openDirAbsolute(path_: []const u8) !std.fs.Dir {
         const res = try sys.openDirAtWindowsA(invalid_fd, path_, true, false).unwrap();
         return std.fs.Dir{ .fd = fdcast(res) };
     } else {
-        const fd = try sys.openA(path_, std.os.O.DIRECTORY | std.os.O.CLOEXEC | 0, 0).unwrap();
+        const fd = try sys.openA(path_, std.os.O.DIRECTORY | std.os.O.CLOEXEC | std.os.O.RDONLY, 0).unwrap();
         return std.fs.Dir{ .fd = fd };
     }
 }
diff --git a/src/install/install.zig b/src/install/install.zig
index 4664db16a6..abf17efc8c 100644
--- a/src/install/install.zig
+++ b/src/install/install.zig
@@ -7258,9 +7258,11 @@ pub const PackageManager = struct {
         const cwd = std.fs.cwd();
         var node_modules_folder = cwd.openIterableDir("node_modules", .{}) catch brk: {
             skip_verify_installed_version_number = true;
-            bun.sys.mkdir("node_modules", 0).throw() catch |err| {
-                Output.prettyErrorln("<r><red>error<r>: <b><red>{s}<r> creating <b>node_modules<r> folder", .{@errorName(err)});
-                Global.crash();
+            bun.sys.mkdir("node_modules", 0o755).throw() catch |err| {
+                if (err != error.EEXIST) {
+                    Output.prettyErrorln("<r><red>error<r>: <b><red>{s}<r> creating <b>node_modules<r> folder", .{@errorName(err)});
+                    Global.crash();
+                }
             };
             break :brk cwd.openIterableDir("node_modules", .{}) catch |err| {
                 Output.prettyErrorln("<r><red>error<r>: <b><red>{s}<r> opening <b>node_modules<r> folder", .{@errorName(err)});