AUR abcMIDI pkg install error

AUR abcMIDI .SRCINFO contents:
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pkgbase = abcmidi
	pkgdesc = A set of tools for converting ABC files to MIDI files and vice versa, as well as other small utilities
	pkgver = 20150417
	pkgrel = 1
	url = http://abc.sourceforge.net/abcMIDI/
	changelog = ChangeLog
	arch = i686
	arch = x86_64
	license = GPL
	makedepends = unzip
	depends = glibc
	source = http://ifdo.pugmarks.com/~seymour/runabc/abcMIDI-2015-04-17.zip
	sha256sums = 764a5ff1d0d6de5289156b76028b025d2f03b8d7bfaeb459c71b82b04cdb0682

pkgname = abcmidi
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AUR abcMIDI PKGBUILD contents:
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# Contributor: Christopher Arndt <chris@chrisarndt.de>
# Contributor: Luis Pablo Gasparotto <lpgasparotto at gmail dot com>
# Contributor: Phillip Fynan <pfynan@gmail.com>
# Maintainer: Peter Sutton <foxxy@foxdogstudios.com>

_pkgver_year=2016
_pkgver_month=05
_pkgver_day=05

pkgname=abcmidi
pkgver="${_pkgver_year}${_pkgver_month}${_pkgver_day}"
pkgrel=1
pkgdesc="A set of tools for converting ABC files to MIDI files and vice versa, as well as other small utilities"
url="http://abc.sourceforge.net/abcMIDI/"
license=('GPL')
depends=()
makedepends=()
changelog=ChangeLog
source=("https://github.com/leesavide/abcmidi/archive/abcmidi-${_pkgver_year}.${_pkgver_month}.${_pkgver_day}.tar.gz")
arch=(i686 x86_64)
sha256sums=('ad5a42215ba9d247864e19f7fe2ea20906e686279dd7b5659314c52bb2df24e0')

_srcdir=abcmidi-abcmidi-${_pkgver_year}.${_pkgver_month}.${_pkgver_day}

build() {
    cd $srcdir/$_srcdir
    make 'binaries=abc2midi midi2abc abc2abc mftext midicopy abcmatch'
}

package() {
    cd $srcdir/$_srcdir
    mkdir -p $pkgdir/usr/bin
    make prefix=$pkgdir/usr 'binaries=abc2midi midi2abc abc2abc mftext midicopy abcmatch' install
    # install programming documentation to docdir
    install -m 755 -d $pkgdir/usr/share/doc/$pkgname/programming
    install -m 644 doc/programming/*.txt doc/programming/*.abc \
        $pkgdir/usr/share/doc/$pkgname/programming
    # install example ABC files to docdir
    install -m 755 -d $pkgdir/usr/share/doc/$pkgname/samples
    install -m 644 samples/*.abc $pkgdir/usr/share/doc/$pkgname/samples
}


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