diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 466dc9f..2c52766 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -292,3 +292,26 @@ jobs:
       #   with:
       #     name: 'ouch-x86_64-pc-windows-gnu'
       #     path: target\x86_64-pc-windows-gnu\release\ouch.exe
+
+  fmt:
+    name: Check sourcecode format
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly
+          target: x86_64-unknown-linux-musl
+          components: rustfmt
+          override: true
+
+      - name: Check format with cargo fmt
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check 
diff --git a/Cargo.lock b/Cargo.lock
index 758456c..75733f1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -157,6 +157,12 @@ dependencies = [
  "miniz_oxide",
 ]
 
+[[package]]
+name = "fs-err"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ebd3504ad6116843b8375ad70df74e7bfe83cac77a1f3fe73200c844d43bfe0"
+
 [[package]]
 name = "getrandom"
 version = "0.2.3"
@@ -294,6 +300,7 @@ dependencies = [
  "clap",
  "clap_generate",
  "flate2",
+ "fs-err",
  "infer",
  "libc",
  "once_cell",
diff --git a/Cargo.toml b/Cargo.toml
index e9d9b02..f290ac0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,6 +15,7 @@ description = "A command-line utility for easily compressing and decompressing f
 [dependencies]
 clap        = "=3.0.0-beta.5" # Keep it pinned while in beta!
 atty        = "0.2.14"
+fs-err      = "2.6.0"
 once_cell   = "1.8.0"
 walkdir     = "2.3.2"
 bzip2       = "0.4.3"
diff --git a/src/archive/tar.rs b/src/archive/tar.rs
index 7106392..4c0d96e 100644
--- a/src/archive/tar.rs
+++ b/src/archive/tar.rs
@@ -1,15 +1,17 @@
 //! Contains Tar-specific building and unpacking functions
 
 use std::{
-    env, fs,
+    env,
     io::prelude::*,
     path::{Path, PathBuf},
 };
 
+use fs_err as fs;
 use tar;
 use walkdir::WalkDir;
 
 use crate::{
+    error::FinalError,
     info,
     utils::{self, Bytes},
     QuestionPolicy,
@@ -63,7 +65,12 @@ where
                 builder.append_dir(path, path)?;
             } else {
                 let mut file = fs::File::open(path)?;
-                builder.append_file(path, &mut file)?;
+                builder.append_file(path, file.file_mut()).map_err(|err| {
+                    FinalError::with_title("Could not create archive")
+                        .detail("Unexpected error while trying to read file")
+                        .detail(format!("Error: {}.", err))
+                        .into_owned()
+                })?;
             }
         }
         env::set_current_dir(previous_location)?;
diff --git a/src/archive/zip.rs b/src/archive/zip.rs
index 3cce681..a43af53 100644
--- a/src/archive/zip.rs
+++ b/src/archive/zip.rs
@@ -1,11 +1,13 @@
 //! Contains Zip-specific building and unpacking functions
 
 use std::{
-    env, fs,
+    env,
     io::{self, prelude::*},
     path::{Path, PathBuf},
 };
 
+use fs_err as fs;
+
 use walkdir::WalkDir;
 use zip::{self, read::ZipFile, ZipArchive};
 
@@ -127,10 +129,11 @@ fn check_for_comments(file: &ZipFile) {
 
 #[cfg(unix)]
 fn __unix_set_permissions(file_path: &Path, file: &ZipFile) -> crate::Result<()> {
+    use std::fs::Permissions;
     use std::os::unix::fs::PermissionsExt;
 
     if let Some(mode) = file.unix_mode() {
-        fs::set_permissions(file_path, fs::Permissions::from_mode(mode))?;
+        fs::set_permissions(file_path, Permissions::from_mode(mode))?;
     }
 
     Ok(())
diff --git a/src/cli.rs b/src/cli.rs
index 7f57c14..4ef39ec 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -6,6 +6,7 @@ use std::{
 };
 
 use clap::Parser;
+use fs_err as fs;
 
 use crate::{Error, Opts, QuestionPolicy, Subcommand};
 
@@ -31,7 +32,7 @@ impl Opts {
 }
 
 fn canonicalize(path: impl AsRef<Path>) -> crate::Result<PathBuf> {
-    match std::fs::canonicalize(&path.as_ref()) {
+    match fs::canonicalize(&path.as_ref()) {
         Ok(abs_path) => Ok(abs_path),
         Err(io_err) => {
             if !path.as_ref().exists() {
diff --git a/src/commands.rs b/src/commands.rs
index 75de550..f58753a 100644
--- a/src/commands.rs
+++ b/src/commands.rs
@@ -3,11 +3,11 @@
 //! Also, where correctly call functions based on the detected `Command`.
 
 use std::{
-    fs,
     io::{self, BufReader, BufWriter, Read, Write},
     path::{Path, PathBuf},
 };
 
+use fs_err as fs;
 use utils::colors;
 
 use crate::{
diff --git a/src/error.rs b/src/error.rs
index a8dd654..4773970 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -21,7 +21,7 @@ pub enum Error {
     FileNotFound(PathBuf),
     AlreadyExists,
     InvalidZipArchive(&'static str),
-    PermissionDenied,
+    PermissionDenied { error_title: String },
     UnsupportedZipArchive(&'static str),
     InternalError,
     CompressingRootFolder,
@@ -78,6 +78,10 @@ impl FinalError {
         self.hints.push(hint.to_string());
         self
     }
+
+    pub fn into_owned(&mut self) -> Self {
+        std::mem::take(self)
+    }
 }
 
 impl fmt::Display for Error {
@@ -134,7 +138,9 @@ impl fmt::Display for Error {
             Error::UnknownExtensionError(_) => todo!(),
             Error::AlreadyExists => todo!(),
             Error::InvalidZipArchive(_) => todo!(),
-            Error::PermissionDenied => todo!(),
+            Error::PermissionDenied { error_title } => {
+                FinalError::with_title(error_title).detail("Permission denied").to_owned()
+            }
             Error::UnsupportedZipArchive(_) => todo!(),
             Error::Custom { reason } => reason.clone(),
         };
@@ -152,8 +158,8 @@ impl Error {
 impl From<std::io::Error> for Error {
     fn from(err: std::io::Error) -> Self {
         match err.kind() {
-            std::io::ErrorKind::NotFound => panic!("{}", err),
-            std::io::ErrorKind::PermissionDenied => Self::PermissionDenied,
+            std::io::ErrorKind::NotFound => todo!(),
+            std::io::ErrorKind::PermissionDenied => Self::PermissionDenied { error_title: err.to_string() },
             std::io::ErrorKind::AlreadyExists => Self::AlreadyExists,
             _other => Self::IoError { reason: err.to_string() },
         }
@@ -177,3 +183,9 @@ impl From<walkdir::Error> for Error {
         Self::WalkdirError { reason: err.to_string() }
     }
 }
+
+impl From<FinalError> for Error {
+    fn from(err: FinalError) -> Self {
+        Self::Custom { reason: err }
+    }
+}
diff --git a/src/utils.rs b/src/utils.rs
index 7c3a0e7..3c77495 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,16 +1,17 @@
 use std::{
     cmp, env,
     ffi::OsStr,
-    fs::{self, ReadDir},
     path::Component,
     path::{Path, PathBuf},
 };
 
+use fs_err as fs;
+
 use crate::{dialogs::Confirmation, info};
 
 /// Checks if the given path represents an empty directory.
 pub fn dir_is_empty(dir_path: &Path) -> bool {
-    let is_empty = |mut rd: ReadDir| rd.next().is_none();
+    let is_empty = |mut rd: std::fs::ReadDir| rd.next().is_none();
 
     dir_path.read_dir().map(is_empty).unwrap_or_default()
 }
diff --git a/tests/compress_and_decompress.rs b/tests/compress_and_decompress.rs
index 6422953..2b6efa1 100644
--- a/tests/compress_and_decompress.rs
+++ b/tests/compress_and_decompress.rs
@@ -1,13 +1,15 @@
 mod utils;
 
 use std::{
-    env, fs,
+    env,
     io::prelude::*,
     path::{Path, PathBuf},
     time::Duration,
 };
 
 use ouch::{commands::run, Opts, QuestionPolicy, Subcommand};
+
+use fs_err as fs;
 use rand::{rngs::SmallRng, RngCore, SeedableRng};
 use tempfile::NamedTempFile;
 use utils::*;
diff --git a/tests/utils.rs b/tests/utils.rs
index 9ee7c7c..e085ec0 100644
--- a/tests/utils.rs
+++ b/tests/utils.rs
@@ -2,10 +2,9 @@
 
 #![allow(dead_code)]
 
-use std::{
-    fs,
-    path::{Path, PathBuf},
-};
+use std::path::{Path, PathBuf};
+
+use fs_err as fs;
 
 use ouch::{commands::run, Opts, QuestionPolicy, Subcommand};