diff --git a/packages/fretboard/PKGBUILD b/packages/fretboard/PKGBUILD
index dfa56512..341ea41b 100644
--- a/packages/fretboard/PKGBUILD
+++ b/packages/fretboard/PKGBUILD
@@ -7,15 +7,22 @@ pkgrel=1
 pkgdesc='Simple guitar chord lookup tool'
 arch=(aarch64 x86_64)
 url='https://apps.gnome.org/Fretboard/'
-license=(GPL-3.0-only)
+license=(GPL-3.0-or-later)
 groups=(pro-audio)
 depends=(gtk4)
 makedepends=(blueprint-compiler git libadwaita meson rust)
 source=("git+https://github.com/bragefuglseth/$pkgname#tag=v$pkgver-fixed")
 sha256sums=('1125cbfc343c05a1cd2ca91c6cbeda6cb2e3f237e77ee841f500fe8c252b65e4')
 
+prepare() {
+  cd $pkgname
+  export RUSTUP_TOOLCHAIN=stable
+  cargo fetch --locked
+}
+
 build() {
-  arch-meson --reconfigure $pkgname build
+  export RUSTUP_TOOLCHAIN=stable
+  arch-meson --reconfigure -Dsandboxed=true $pkgname build
   meson compile -C build
 }