diff --git a/Cargo.lock b/Cargo.lock
index e56c185..4ec9784 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,85 +2,18 @@
 # It is not intended for manual editing.
 version = 3
 
-[[package]]
-name = "ahash"
-version = "0.7.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcb51a0695d8f838b1ee009b3fbf66bda078cd64590202a864a8f3e8c4315c47"
-dependencies = [
- "getrandom",
- "once_cell",
- "version_check",
-]
-
 [[package]]
 name = "autocfg"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
-[[package]]
-name = "bit_field"
-version = "0.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcb6dd1c2376d2e096796e234a70e17e94cc2d5d54ff8ce42b28cef1d0d359a4"
-
-[[package]]
-name = "bitflags"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
-[[package]]
-name = "cfg-if"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
 [[package]]
 name = "cobs"
 version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67ba02a97a2bd10f4b59b25c7973101c79642302776489e030cd13cdab09ed15"
 
-[[package]]
-name = "core2"
-version = "0.4.0"
-dependencies = [
- "memchr",
- "serde",
-]
-
-[[package]]
-name = "crossbeam-queue"
-version = "0.3.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cd42583b04998a5363558e5f9291ee5a5ff6b49944332103f251e7479a82aa7"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.8.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51887d4adc7b564537b15adcfb307936f8075dfcd5f00dde9a9f1d29383682bc"
-dependencies = [
- "cfg-if",
-]
-
-[[package]]
-name = "derive-try-from-primitive"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "302ccf094df1151173bb6f5a2282fcd2f45accd5eae1bdf82dcbfefbc501ad5c"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "dev_driver_rpc"
 version = "0.1.0"
@@ -88,53 +21,6 @@ dependencies = [
  "postcard",
  "serde",
  "spin",
- "std",
-]
-
-[[package]]
-name = "elfloader"
-version = "0.14.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a249d6a9d50f3bf5a3cb7bfd75e84989cad89c6c77b5996c8b084e844146ff04"
-dependencies = [
- "bitflags",
- "log",
- "xmas-elf",
-]
-
-[[package]]
-name = "getrandom"
-version = "0.2.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi",
-]
-
-[[package]]
-name = "hashbrown"
-version = "0.12.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
-dependencies = [
- "ahash",
-]
-
-[[package]]
-name = "libc"
-version = "0.2.132"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8371e4e5341c3a96db127eb2465ac681ced4c433e01dd0e938adbef26ba93ba5"
-
-[[package]]
-name = "linked_list_allocator"
-version = "0.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "636c3bc929db632724303109c88d5d559a2a60f62243bb041387f03fa081d94a"
-dependencies = [
- "spinning_top",
 ]
 
 [[package]]
@@ -147,27 +33,6 @@ dependencies = [
  "scopeguard",
 ]
 
-[[package]]
-name = "log"
-version = "0.4.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
-dependencies = [
- "cfg-if",
-]
-
-[[package]]
-name = "memchr"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
-
-[[package]]
-name = "once_cell"
-version = "1.14.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f7254b99e31cad77da24b08ebf628882739a608578bb1bcdfc1f9c21260d7c0"
-
 [[package]]
 name = "postcard"
 version = "1.0.2"
@@ -180,28 +45,22 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.43"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
+checksum = "22244ce15aa966053a896d1accb3a6e68469b97c7f33f284b99f0d576879fc23"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.21"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "rustversion"
-version = "1.0.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97477e48b4cf8603ad5f7aaf897467cf42ab4218a38ef76fb14c2d6773a6d6a8"
-
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -210,18 +69,18 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
 name = "serde"
-version = "1.0.144"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f747710de3dcd43b88c9168773254e809d8ddbdf9653b84e2554ab219f17860"
+checksum = "7253ab4de971e72fb7be983802300c30b5a7f0c2e56fab8abfc6a214307c0094"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.144"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94ed3a816fb1d101812f83e789f888322c34e291f894f19590dc310963e87a00"
+checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -237,36 +96,11 @@ dependencies = [
  "lock_api",
 ]
 
-[[package]]
-name = "spinning_top"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75adad84ee84b521fb2cca2d4fd0f1dab1d8d026bda3c5bea4ca63b5f9f9293c"
-dependencies = [
- "lock_api",
-]
-
-[[package]]
-name = "std"
-version = "0.1.0"
-dependencies = [
- "core2",
- "crossbeam-queue",
- "derive-try-from-primitive",
- "elfloader",
- "hashbrown",
- "linked_list_allocator",
- "postcard",
- "serde",
- "spin",
- "x86_64",
-]
-
 [[package]]
 name = "syn"
-version = "1.0.99"
+version = "2.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
+checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -278,48 +112,3 @@ name = "unicode-ident"
 version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
-
-[[package]]
-name = "version_check"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
-
-[[package]]
-name = "volatile"
-version = "0.4.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3ca98349dda8a60ae74e04fd90c7fb4d6a4fbe01e6d3be095478aa0b76f6c0c"
-
-[[package]]
-name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
-
-[[package]]
-name = "x86_64"
-version = "0.14.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "100555a863c0092238c2e0e814c1096c1e5cf066a309c696a87e907b5f8c5d69"
-dependencies = [
- "bit_field",
- "bitflags",
- "rustversion",
- "volatile",
-]
-
-[[package]]
-name = "xmas-elf"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d29b4d8e7beaceb4e77447ba941a7600d23d0319ab52da0461abea214832d5a"
-dependencies = [
- "zero",
-]
-
-[[package]]
-name = "zero"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f1bc8a6b2005884962297587045002d8cfb8dcec9db332f4ca216ddc5de82c5"
diff --git a/Cargo.toml b/Cargo.toml
index 7e08e7b..3809545 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2021"
 postcard = { version = "1.0.2", default-features = false, features = ["alloc"] }
 serde = { version = "1.0.144", default-features = false, features = ["alloc", "derive"] }
 spin = "0.9.4"
-std = { version = "0.1.0", path = "../std" }
+# std = { version = "0.1.0", path = "../std" }
 
 [profile.dev]
 panic="abort"
diff --git a/src/lib.rs b/src/lib.rs
index b0346d2..a91dd8e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,10 +1,9 @@
-#![no_std]
+// #![no_std]
 #![allow(clippy::result_unit_err)]
 
 use std::{
-    boxed::Box,
     io,
-    ipc::rpc::{self, IncomingCall},
+    os::mikros::ipc::rpc::{self, IncomingCall},
 };
 
 use spin::RwLock;
@@ -25,7 +24,7 @@ impl Client {
         Self(pid)
     }
 
-    pub fn open(self, path: &str) -> Result<u64, io::Error> {
+    pub fn open(self, path: &str) -> Result<u64, ()> {
         postcard::from_bytes(
             &rpc::send_call(self.0, PROTO, 0, &postcard::to_allocvec(path).unwrap()).get_return(),
         )
@@ -48,7 +47,7 @@ fn callback(call: IncomingCall) {
     let server = server_lock.as_ref().unwrap();
     if call.func == 0 {
         let path = postcard::from_bytes(&call.args).unwrap();
-        let ret = postcard::to_allocvec(&server.open(path)).unwrap();
+        let ret = postcard::to_allocvec(&server.open(path).map_err(|e| ())).unwrap();
         call.send_return(&ret);
     }
 }