diff --git a/app-misc/piper/Manifest b/app-misc/piper/Manifest
index c2c9aa2..d8a9915 100644
--- a/app-misc/piper/Manifest
+++ b/app-misc/piper/Manifest
@@ -1,5 +1,4 @@
-DIST piper-0.2.901.tar.gz 71670 BLAKE2B 8a78722c3ee948c81d26f57d83e67bf90c8e7d2e247106546771bcd44e4aed68ec7f41e584a89e7a208cce08ce4642cbc0b6e3248d2372458a4a88a51a2da384 SHA512 79860ac47d962c4af509fe344c6df6a8988904ba4983f4277f0302b245d004fce29da2f1c17718e288a7b7b5ffc18e186f36ddb38ecd85536f2651675f608623
-DIST piper-0.2.902.tar.gz 74007 BLAKE2B 23ae4a6740f5dc95ef368fbf9e517e02ef5b24314f51bd9b0a48ce34b9f5e579d54eaafcf1efdf4f757d11eba672d910cd13c211210e8268b7d4aa04f4e5fa5b SHA512 2b6733a539de6b46eb43fd830b59d9ac02778d54ccb0e6f219962d8b69061f2259e6f8afa6c78aa89c4543a4b7009ae84322e8e417374f778086d1cf6e2b8d6e
-EBUILD piper-0.2.901.ebuild 680 BLAKE2B bbddfba622cdbfbe0d6f97585a10f0c17f36dd9529a761b44ed5ed46ac29df2982b4fdd37b0aa32975ab6d98fabc2d6196c7fed093d7d8b0b13cc431ada7eb50 SHA512 ed9403af606fe97d814dd9f77c4040664dd72c2db20d6241d597d25c301e547ef9344ed7605aada24eaeb6a0869c76a62f5faf8c2a294949b79ae46cf064b50c
-EBUILD piper-0.2.902.ebuild 680 BLAKE2B bbddfba622cdbfbe0d6f97585a10f0c17f36dd9529a761b44ed5ed46ac29df2982b4fdd37b0aa32975ab6d98fabc2d6196c7fed093d7d8b0b13cc431ada7eb50 SHA512 ed9403af606fe97d814dd9f77c4040664dd72c2db20d6241d597d25c301e547ef9344ed7605aada24eaeb6a0869c76a62f5faf8c2a294949b79ae46cf064b50c
+AUX piper-0.2.904-fix-python3-shebang.patch 917 BLAKE2B 42eb9e382d2c97a99e8bd0a1c38d7acf03e6e782cf4f6c5e313ec7a03987f516c88ce4eddd7c7d30769403b78f3dd61845ea949fd6b6810078e1a71d958ab9df SHA512 18fb338f3664bcf1a5d2bf69eb35139990ce4a549d1b728d6374d9526c21c08dbd91602fffa32a72222a1712a5d946eafd3463dc30fe39301f013501f345eff5
+DIST piper-0.2.904.tar.gz 178715 BLAKE2B ac5aa0cb47c1eadd1232ebab170c02e731da8686893a8ee231105cb064b320f339f3e834e56c61790d138151a7ed4416438604d743ca2e16d4fdbf5a974b9b63 SHA512 425d233a89eebf391650ae121134dd532bf75e0f6e15168c89ab86f3b5bac1adb6dfa985c0028a2285f85655226200b5cfe28f36cfd83814985f97ffa3774412
+EBUILD piper-0.2.904.ebuild 745 BLAKE2B caeaf9fa402799536eec17c57f8f7cd9621ec30e6e0f12f7ffb9ecf115e58124d7cd9982c401f0069a0e9315cc6bb31be5c8287bb35bedca6d92e20b387a50cd SHA512 d9f7d78d226ffe583cf8ee25d8c2382f75ef5a65b5b72954850b6d5b46c79786059721bc93196c40473a232640b3a3e5ec2617d0dc92dd1a8bb3cec012bed08a
 MISC metadata.xml 480 BLAKE2B 628471473bfa2fe2e495ef6daad43ab16bff6b2f62554ba987b7fa240efca9f54e4e42783590795c791ffcaf731b18736116152d75af91aa8339f7534ba4dd69 SHA512 1dd51740d531f6aa880af85346ddb0aceba018ba7de7fa4fe665eec9f074400416c48905d4adcd3a834ea2bf953713f0cbcf9ef01d1c507d1177a564085297c2
diff --git a/app-misc/piper/files/piper-0.2.904-fix-python3-shebang.patch b/app-misc/piper/files/piper-0.2.904-fix-python3-shebang.patch
new file mode 100644
index 0000000..38239cf
--- /dev/null
+++ b/app-misc/piper/files/piper-0.2.904-fix-python3-shebang.patch
@@ -0,0 +1,30 @@
+From 63d760a3bbf420063cff3f978bc9c05e39de149a Mon Sep 17 00:00:00 2001
+From: David Guglielmi <david.guglielmi@gmail.com>
+Date: Sun, 3 Mar 2019 16:46:17 +0100
+Subject: [PATCH] svgs: use /usr/bin/env shebang for python3 scripts
+
+---
+ data/generate-piper-gresource.xml.py | 2 +-
+ data/svgs/check-svg.py               | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/data/generate-piper-gresource.xml.py b/data/generate-piper-gresource.xml.py
+index 19bc43d..af12cac 100644
+--- a/data/generate-piper-gresource.xml.py
++++ b/data/generate-piper-gresource.xml.py
+@@ -1,4 +1,4 @@
+-#!/bin/python3
++#!/usr/bin/env python3
+ 
+ import sys
+ 
+diff --git a/data/svgs/check-svg.py b/data/svgs/check-svg.py
+index fafc3f2..f62ccea 100755
+--- a/data/svgs/check-svg.py
++++ b/data/svgs/check-svg.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python3
++#!/usr/bin/env python3
+ # vim: set expandtab shiftwidth=4 tabstop=4:
+ 
+ import os
diff --git a/app-misc/piper/piper-0.2.902.ebuild b/app-misc/piper/piper-0.2.902.ebuild
deleted file mode 100644
index c7a7395..0000000
--- a/app-misc/piper/piper-0.2.902.ebuild
+++ /dev/null
@@ -1,34 +0,0 @@
-# Copyright 1999-2018 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-
-EAPI=6
-PYTHON_COMPAT=( python{3_4,3_5,3_6} )
-
-inherit gnome2 meson python-r1
-
-DESCRIPTION="GTK application to configure gaming mice"
-HOMEPAGE="https://github.com/libratbag/piper"
-SRC_URI="https://github.com/libratbag/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
-
-LICENSE="GPL-2"
-SLOT="0"
-KEYWORDS="~amd64 ~x86"
-IUSE=""
-
-DEPEND="
-	virtual/pkgconfig
-	dev-python/pygobject:3
-	>=x11-libs/gtk+-3.22:3[introspection]
-"
-RDEPEND="
-	dev-libs/libratbag
-	dev-python/python-evdev[${PYTHON_USEDEP}]
-"
-src_prepare() {
-    python_setup
-	default
-}
-
-src_configure() {
-	meson_src_configure
-}
diff --git a/app-misc/piper/piper-0.2.901.ebuild b/app-misc/piper/piper-0.2.904.ebuild
similarity index 86%
rename from app-misc/piper/piper-0.2.901.ebuild
rename to app-misc/piper/piper-0.2.904.ebuild
index c7a7395..629c283 100644
--- a/app-misc/piper/piper-0.2.901.ebuild
+++ b/app-misc/piper/piper-0.2.904.ebuild
@@ -15,17 +15,19 @@ SLOT="0"
 KEYWORDS="~amd64 ~x86"
 IUSE=""
 
+PATCHES=( "${FILESDIR}"/${P}-fix-python3-shebang.patch )
+
 DEPEND="
 	virtual/pkgconfig
 	dev-python/pygobject:3
 	>=x11-libs/gtk+-3.22:3[introspection]
 "
 RDEPEND="
-	dev-libs/libratbag
+	>=dev-libs/libratbag-0.9.905
 	dev-python/python-evdev[${PYTHON_USEDEP}]
 "
 src_prepare() {
-    python_setup
+	python_setup
 	default
 }