diff --git a/micropython-1.25.0.tar.xz b/micropython-1.25.0.tar.xz
index 63179f7..853a67e 100644
--- a/micropython-1.25.0.tar.xz
+++ b/micropython-1.25.0.tar.xz
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:9fe99ad5808e66bb40d374f5cad187c32c7d1c49cf47f72b38fd453c28c2aebe
-size 109072312
+oid sha256:c9028d4ac8389890329a717e6bc5d2a8fb3145d3526fa24387e418f531972d4a
+size 58476060
diff --git a/micropython.changes b/micropython.changes
index 6314f1c..b8857fe 100644
--- a/micropython.changes
+++ b/micropython.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Mon May 26 11:53:07 UTC 2025 - Dominik Heidler <dheidler@suse.de>
+
+- Add script to delete some 3rd party libraries from the src tar
+  that are not needed to build the unix port in order to
+  make the legal review easier
+
 -------------------------------------------------------------------
 Wed Apr 16 11:59:42 UTC 2025 - Dominik Heidler <dheidler@suse.de>
 
diff --git a/micropython.spec b/micropython.spec
index 731d2c4..835d04c 100644
--- a/micropython.spec
+++ b/micropython.spec
@@ -25,7 +25,7 @@ Release:        0
 Summary:        Implementation of Python 3 with very low memory footprint
 License:        MIT
 URL:            https://micropython.org/
-Source:         https://micropython.org/resources/source/%{name}-%{version}.tar.xz
+Source:         %{name}-%{version}.tar.xz
 BuildRequires:  openssl
 BuildRequires:  pkgconfig
 BuildRequires:  python3
diff --git a/prepare.sh b/prepare.sh
new file mode 100644
index 0000000..85bf8b3
--- /dev/null
+++ b/prepare.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# this removes some 3rd party libraries from the src tar that are not needed to build the unix port
+# in order to make the legal review easier
+
+set -e
+
+version=$(rpmspec --query micropython.spec | head -1 | cut -d- -f2)
+
+rm -fv micropython-*.tar.xz
+wget "https://micropython.org/resources/source/micropython-${version}.tar.xz" -O "micropython-${version}.tar.xz"
+tar xf "micropython-${version}.tar.xz"
+pushd "micropython-${version}"
+rm -rv "lib/fsp"
+rm -rv "lib/alif-security-toolkit"
+pushd "lib/btstack/port"
+find . -maxdepth 1 -type d | grep -v libusb | grep -v posix | grep -v qt- | xargs rm -rv || :
+popd
+popd
+tar caf "micropython-${version}.tar.xz" "micropython-${version}"
+rm -r "micropython-${version}"