diff --git i/trunk/PKGBUILD w/trunk/PKGBUILD
index ea4f726b..b9923bd8 100644
--- i/trunk/PKGBUILD
+++ w/trunk/PKGBUILD
@@ -1,19 +1,19 @@
 # Maintainer: Sven-Hendrik Haase <svenstaro@gmail.com>
+# Contributor: David Runge <dvzrv@archlinux.org>
 # Contributor: Kaiting Chen <kaitocracy@gmail.com>
 # Contributor: Simon Lipp <aur@simon.lipp.name>
 # Contributor: Daniel Grana <dangra@gmail.com>
 
 pkgname=s3cmd
 pkgver=2.1.0
-pkgrel=4
+pkgrel=5
 pkgdesc="A command line client for Amazon S3"
 arch=('any')
 url='http://s3tools.org/s3cmd'
-license=('GPL')
-depends=('python' 'python-dateutil')
+license=('GPL2')
+depends=('python-dateutil' 'python-magic')
 makedepends=('python-setuptools')
-optdepends=('gnupg: encrypted file storage'
-            'python-magic: determine mimetype based on contents')
+optdepends=('gnupg: encrypted file storage')
 source=(https://github.com/s3tools/s3cmd/releases/download/v${pkgver}/s3cmd-${pkgver}.tar.gz{,.asc}
         https://patch-diff.githubusercontent.com/raw/s3tools/s3cmd/pull/1144.patch
         https://patch-diff.githubusercontent.com/raw/s3tools/s3cmd/pull/1137.patch)
@@ -24,12 +24,18 @@ sha512sums=('98156218c4379e233185662d29fa4299b4a4e45a0fe143a145f30ff7d03362a4558
 validpgpkeys=(0D37A8F4A5D183D5541D85D9241769189AC3D00B)
 
 prepare() {
-  cd "${srcdir}/${pkgname}-${pkgver}"
-  patch -Np1 -i "$srcdir"/1144.patch
-  patch -Np1 -i "$srcdir"/1137.patch
+  cd "${pkgname}-${pkgver}"
+  # python3.9 compatibility fixes
+  patch -Np1 -i ../1144.patch
+  patch -Np1 -i ../1137.patch
+}
+
+build() {
+  cd "${pkgname}-${pkgver}"
+  python setup.py build
 }
 
 package() {
-  cd "${srcdir}/${pkgname}-${pkgver}"
-  python setup.py install --root="$pkgdir"
+  cd "${pkgname}-${pkgver}"
+  python setup.py install --root="$pkgdir" --optimize=1 --skip-build
 }