diff --git a/README.md b/README.md
index 46d5809..e88efb0 100644
--- a/README.md
+++ b/README.md
@@ -173,12 +173,10 @@ It is recommended to use the script with a prepared config.
 
 # Other Notes
 
-By default, `makechrootpkg` does not verify integrity of files in the PKGBUILD.
-Use the `makechrootpkg_noskipinteg.hook` to modify the `makechrootpkg` script to
-not skip integrity checks.
+~~By default, `makechrootpkg` does not verify integrity of files in the
+PKGBUILD. Use the `makechrootpkg_noskipinteg.hook` to modify the
+`makechrootpkg` script to not skip integrity checks.~~
 
-The hook must be placed in `/etc/pacman.d/hooks/`.
-
-Note that the hook only takes effect when `devtools` is updated. If you want to
-activate the hook immediately, you can reinstall `devtools` with
-`pacman -S devtools`.
+`update.py` now does integrity checks before building with `makechrootpkg`. It
+is no longer necessary to modify the `/usr/bin/makechrootpkg` because the
+integrity checks are done separately.
diff --git a/makechrootpkg_noskipinteg.hook b/makechrootpkg_noskipinteg.hook
deleted file mode 100644
index 90902da..0000000
--- a/makechrootpkg_noskipinteg.hook
+++ /dev/null
@@ -1,11 +0,0 @@
-[Trigger]
-Operation = Install
-Operation = Upgrade
-Type = Package
-Target = devtools
-
-[Action]
-Description = Force makechrootpkg to not --skipinteg
-When = PostTransaction
-Exec = /usr/bin/sed -i '/^default_makepkg_args=.*$/s/ --skipinteg//' /usr/bin/makechrootpkg
-Depends = devtools
diff --git a/update.py b/update.py
index e9ca8c9..1268c7d 100755
--- a/update.py
+++ b/update.py
@@ -1010,7 +1010,6 @@ def update_pkg_list(
         sys.exit(1)
     for pkg in pkgs:
         pkgdir = os.path.join(other_state["clones_dir"], pkg)
-        log_print(f'Building "{pkg}"...')
         if "ccache_dir" in pkg_state[pkg]:
             cleanup_sccache(other_state["chroot"])
             setup_ccache(other_state["chroot"])
@@ -1021,6 +1020,24 @@ def update_pkg_list(
             else:
                 cleanup_sccache(other_state["chroot"])
 
+        # check integrity
+        log_print(f"Checking files of {pkg} before building it...")
+        try:
+            subprocess.run(
+                (
+                    "/usr/bin/env",
+                    "makepkg",
+                    "--verifysource"
+                ),
+                check=True,
+                cwd=pkgdir,
+            )
+        except:
+            log_print(f"ERROR: Failed to verify pkg \"{pkg}\"")
+            pkg_state[pkg]["build_status"] = "fail"
+            continue
+
+        log_print(f'Building "{pkg}"...')
         command_list = [
             "/usr/bin/env",
             "makechrootpkg",
@@ -1302,7 +1319,11 @@ def test_gpg_passphrase(
 ):
     """Checks if the given gpg passphrase works with the gpg signing key."""
 
-    with tempfile.NamedTemporaryFile() as tempnf:
+    local_share_dir = os.path.join(os.environ["HOME"], ".local", "share")
+    local_share_dir_path = Path(local_share_dir)
+    if not local_share_dir_path.exists():
+        local_share_dir_path.mkdir(parents=True)
+    with tempfile.NamedTemporaryFile(dir=local_share_dir) as tempnf:
         tempnf.write(b"Test file content")
         tempnf.flush()
         try: