diff --git a/extra/libb2/.SRCINFO b/extra/libb2/.SRCINFO
new file mode 100644
index 000000000..166ac549b
--- /dev/null
+++ b/extra/libb2/.SRCINFO
@@ -0,0 +1,14 @@
+pkgbase = libb2
+	pkgdesc = C library providing BLAKE2b, BLAKE2s, BLAKE2bp, BLAKE2sp hash functions
+	pkgver = 0.98.1
+	pkgrel = 3
+	url = https://blake2.net/
+	arch = x86_64
+	license = CC0-1.0
+	makedepends = git
+	depends = gcc-libs
+	depends = glibc
+	source = git+https://github.com/BLAKE2/libb2#tag=v0.98.1
+	sha256sums = eb6b596bc30918427d1e792914f454c1d3e61fef3d4499f6605ede78f835cc1b
+
+pkgname = libb2
diff --git a/extra/libb2/.nvchecker.toml b/extra/libb2/.nvchecker.toml
new file mode 100644
index 000000000..8ca8f2e8c
--- /dev/null
+++ b/extra/libb2/.nvchecker.toml
@@ -0,0 +1,5 @@
+[libb2]
+source = 'github'
+github = 'BLAKE2/libb2'
+use_max_tag = true
+prefix = 'v'
diff --git a/extra/libb2/PKGBUILD b/extra/libb2/PKGBUILD
index 8eb031a97..f4c92bb43 100644
--- a/extra/libb2/PKGBUILD
+++ b/extra/libb2/PKGBUILD
@@ -7,32 +7,44 @@
 
 pkgname=libb2
 pkgver=0.98.1
-pkgrel=2
+pkgrel=3
 arch=(x86_64)
 pkgdesc='C library providing BLAKE2b, BLAKE2s, BLAKE2bp, BLAKE2sp hash functions'
 url='https://blake2.net/'
-license=(custom:CC0)
-depends=(gcc-libs)
-source=("https://github.com/BLAKE2/libb2/releases/download/v$pkgver/$pkgname-$pkgver.tar.gz")
-sha256sums=('53626fddce753c454a3fea581cbbc7fe9bbcf0bc70416d48fdbbf5d87ef6c72e')
+license=(CC0-1.0)
+depends=(gcc-libs
+         glibc)
+makedepends=(git)
+source=(git+https://github.com/BLAKE2/libb2#tag=v$pkgver)
+sha256sums=('eb6b596bc30918427d1e792914f454c1d3e61fef3d4499f6605ede78f835cc1b')
 
 # libb2's build system discards the $CFLAGS variable.
 # We can get around this by putting those flags in $CC.
 export CC="${CC-cc} $CFLAGS"
 
+prepare() {
+  cd $pkgname
+  autoreconf -vi
+}
+
 build() {
-  cd "$pkgname-$pkgver"
-  ./configure --prefix=/usr --disable-static --enable-shared --disable-native --disable-fat
+  cd $pkgname
+  ./configure \
+    --prefix=/usr \
+    --disable-static \
+    --enable-shared \
+    --disable-native \
+    --disable-fat
   make
 }
 
 check() {
-  cd $pkgname-$pkgver
+  cd $pkgname
   make check
 }
 
 package() {
-  cd $pkgname-$pkgver
+  cd $pkgname
   make DESTDIR="$pkgdir" install
   install -Dm644 COPYING -t "$pkgdir"/usr/share/licenses/$pkgname
 }