diff --git a/scripts/COPY b/scripts/COPY
index ee8587f..d1536f0 100755
--- a/scripts/COPY
+++ b/scripts/COPY
@@ -8,7 +8,7 @@ import sys
 def main():
     chroot = os.environ["CHROOT"]
     target = sys.argv[-1]
-    chroot_target = os.path.join(chroot, target.lstrip('/'))
+    chroot_target = os.path.join(chroot, target.lstrip("/"))
     command = ["cp"] + sys.argv[1:-1] + [chroot_target]
 
     subprocess.check_call(command)
diff --git a/scripts/build-kernel b/scripts/build-kernel
index 753bc5f..3950f1e 100755
--- a/scripts/build-kernel
+++ b/scripts/build-kernel
@@ -4,86 +4,82 @@ import os
 import shutil
 import subprocess
 
-EMERGE = os.environ['EMERGE'].split()
-USEPKG = os.environ['USEPKG'].split()
+EMERGE = os.environ["EMERGE"].split()
+USEPKG = os.environ["USEPKG"].split()
 
 
 def get_latest_available_kernel():
-    kernel = os.environ['KERNEL']
-    package_name = 'sys-kernel/{}'.format(kernel)
+    kernel = os.environ["KERNEL"]
+    package_name = "sys-kernel/{}".format(kernel)
     popen = subprocess.Popen(
-        ['portageq', 'best_visible', '/', package_name],
-        stdout=subprocess.PIPE,
+        ["portageq", "best_visible", "/", package_name], stdout=subprocess.PIPE
     )
     cpv = popen.stdout.read().decode().strip()
 
-    return cpv.rpartition('-')[2]
+    return cpv.rpartition("-")[2]
 
 
 def get_current_kernel():
     """what kernel does /boot/vmlinuz point to"""
-    vmlinuz = '/boot/vmlinuz'
+    vmlinuz = "/boot/vmlinuz"
 
     if not os.path.islink(vmlinuz):
         return None
 
     filename = os.path.basename(os.path.realpath(vmlinuz))
-    assert filename.startswith('vmlinuz')
+    assert filename.startswith("vmlinuz")
     part_after_vmlinuz = filename[8:]
 
     # may have "-gentoo" or whatever in the name
-    version = part_after_vmlinuz.rpartition('-')[0]
+    version = part_after_vmlinuz.rpartition("-")[0]
 
     return version
 
 
 def install_kernel_package():
-    kernel = os.environ['KERNEL']
-    package_name = 'sys-kernel/{}'.format(kernel)
-    cmd = EMERGE + USEPKG + ['--oneshot',  '--noreplace', package_name]
+    kernel = os.environ["KERNEL"]
+    package_name = "sys-kernel/{}".format(kernel)
+    cmd = EMERGE + USEPKG + ["--oneshot", "--noreplace", package_name]
 
     subprocess.check_call(cmd)
 
 
 def copy_kernel_config():
-    filename = '/root/kernel.config'
+    filename = "/root/kernel.config"
 
-    shutil.copy(filename, '/usr/src/linux/.config')
+    shutil.copy(filename, "/usr/src/linux/.config")
 
 
 def build_kernel():
-    makeopts = os.environ.get('MAKEOPTS', '')
+    makeopts = os.environ.get("MAKEOPTS", "")
 
-    subprocess.check_call([
-        'make', '-C', '/usr/src/linux', 'MAKEOPTS=' + makeopts, 'oldconfig'
-    ])
-    subprocess.check_call([
-        'make', '-C', '/usr/src/linux', 'MAKEOPTS=' + makeopts
-    ])
+    subprocess.check_call(
+        ["make", "-C", "/usr/src/linux", "MAKEOPTS=" + makeopts, "oldconfig"]
+    )
+    subprocess.check_call(["make", "-C", "/usr/src/linux", "MAKEOPTS=" + makeopts])
 
 
 def remove_old_kernels():
-    kernel_files = ['vmlinuz-', 'System.map-', 'config-']
+    kernel_files = ["vmlinuz-", "System.map-", "config-"]
 
-    for filename in os.listdir('/boot'):
+    for filename in os.listdir("/boot"):
         for kernel_file in kernel_files:
             if filename.startswith(kernel_file):
-                path = os.path.join('/boot', filename)
+                path = os.path.join("/boot", filename)
                 os.unlink(path)
 
-    if os.path.exists('/boot/vmlinuz'):
-        os.unlink('/boot/vmlinuz')
+    if os.path.exists("/boot/vmlinuz"):
+        os.unlink("/boot/vmlinuz")
 
-    shutil.rmtree('/lib/modules', ignore_errors=True)
+    shutil.rmtree("/lib/modules", ignore_errors=True)
 
 
 def install_kernel():
-    makeopts = os.environ.get('MAKEOPTS', '')
+    makeopts = os.environ.get("MAKEOPTS", "")
 
-    subprocess.check_call([
-        'make', '-C', '/usr/src/linux', 'MAKEOPTS=' + makeopts, 'install',
-        'modules_install'
-    ])
+    subprocess.check_call(
+        ["make", "-C", "/usr/src/linux", "MAKEOPTS=" + makeopts, "install", "modules_install"]
+    )
 
     # create the symlink.  /sbin/installkernel claims this is not used on
     # "modern" distributions and doesn't create it (unless it already
@@ -97,15 +93,13 @@ def install_kernel():
 
 
 def uninstall_kernel_package():
-    subprocess.check_call([
-        'make', '-C', '/usr/src/linux', 'distclean'
-    ])
+    subprocess.check_call(["make", "-C", "/usr/src/linux", "distclean"])
 
-    subprocess.check_call(EMERGE + USEPKG + ['--depclean', '--with-bdeps=n'])
+    subprocess.check_call(EMERGE + USEPKG + ["--depclean", "--with-bdeps=n"])
 
 
 def backup_kernel_config():
-    shutil.copy('/usr/src/linux/.config', '/root/kernel.config')
+    shutil.copy("/usr/src/linux/.config", "/root/kernel.config")
 
 
 def main():
@@ -126,4 +120,3 @@ def main():
 
 
 main()
-