diff --git a/siril.changes b/siril.changes
index 0299cb8..fbb1921 100644
--- a/siril.changes
+++ b/siril.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Wed Sep 30 13:41:48 UTC 2020 - Stefan Brüns <stefan.bruens@rwth-aachen.de>
+
+- Clean up specfile:
+  * Remove no longer required autoconf, automake and intltool build deps
+  * Remove irrelevant cmake build dep
+  * Remove duplicated libjpeg/exiv2 devel build deps
+  * Add comment for overriding meson_build directory
+  
 -------------------------------------------------------------------
 Mon Sep 21 06:49:37 UTC 2020 - Paolo Stivanin <info@paolostivanin.com>
 
diff --git a/siril.spec b/siril.spec
index 6f7cd58..f13738d 100644
--- a/siril.spec
+++ b/siril.spec
@@ -15,7 +15,6 @@
 # Please submit bugfixes or comments via https://bugs.opensuse.org/
 #
 
-%define _vpath_builddir builddir
 
 Name:           siril
 Version:        0.99.4
@@ -25,20 +24,15 @@ License:        GPL-3.0-only
 Group:          Productivity/Scientific/Physics
 URL:            https://www.siril.org/
 Source:         https://gitlab.com/free-astro/siril/-/archive/%{version}/siril-%{version}.tar.bz2
-BuildRequires:  autoconf
-BuildRequires:  automake
-BuildRequires:  cmake
 BuildRequires:  gcc-c++
-BuildRequires:  intltool
-BuildRequires:  libjpeg-devel
+# Remove git build dep when fixed upstream: https://gitlab.com/free-astro/siril/-/issues/583
+BuildRequires:  git
+BuildRequires:  meson
 BuildRequires:  opencv-devel
 BuildRequires:  pkgconfig
 BuildRequires:  shared-mime-info
-BuildRequires:  libexiv2-devel
-BuildRequires:  meson
-BuildRequires:  git
-BuildRequires:  pkgconfig(rtprocess)
 BuildRequires:  pkgconfig(cfitsio)
+BuildRequires:  pkgconfig(exiv2)
 BuildRequires:  pkgconfig(ffms2)
 BuildRequires:  pkgconfig(fftw3)
 BuildRequires:  pkgconfig(gsl)
@@ -48,13 +42,13 @@ BuildRequires:  pkgconfig(libavformat)
 BuildRequires:  pkgconfig(libavutil) >= 55.20
 BuildRequires:  pkgconfig(libconfig++) >= 1.4
 BuildRequires:  pkgconfig(libcurl)
+BuildRequires:  pkgconfig(libjpeg)
+BuildRequires:  pkgconfig(libpng16)
 BuildRequires:  pkgconfig(libraw)
 BuildRequires:  pkgconfig(libswresample)
 BuildRequires:  pkgconfig(libswscale)
 BuildRequires:  pkgconfig(libtiff-4)
-BuildRequires:  pkgconfig(exiv2)
-BuildRequires:  pkgconfig(libpng16)
-BuildRequires:  pkgconfig(libjpeg)
+BuildRequires:  pkgconfig(rtprocess)
 
 %description
 Siril is meant to be Iris for Linux (sirI-L). It is an astronomical image
@@ -65,6 +59,8 @@ automatically or manually, stack them and enhance final images.
 %setup -q
 
 %build
+# override build directory, the default "build" is a regular source directory
+%define _vpath_builddir builddir
 %meson  \
     -Drelocatable-bundle=no \
     %{nil}