diff --git a/makechrootpkg.in b/makechrootpkg.in
index afcd121..5a79dc0 100644
--- a/makechrootpkg.in
+++ b/makechrootpkg.in
@@ -182,9 +182,10 @@ prepare_chroot() {
 
 	$install -d "$copydir"/{build,build/.gnupg,startdir,{pkg,srcpkg,src,log}dest}
 
-	for x in .gnupg/pubring.{kbx,gpg}; do
-		[[ -r $USER_HOME/$x ]] || continue
-		$install -m 644 "$USER_HOME/$x" "$copydir/build/$x"
+	for x in pubring.{kbx,gpg}; do
+		local pubring="${GNUPGHOME:-$USER_HOME/.gnupg}/$x"
+		[[ -r "$pubring" ]] || continue
+		$install -m 644 "$pubring" "$copydir/build/.gnupg/$x"
 	done
 
 	sed -e '/^MAKEFLAGS=/d' -e '/^PACKAGER=/d' -i "$copydir/etc/makepkg.conf"
@@ -252,7 +253,8 @@ download_sources() {
 	chmod 1777 "$builddir"
 
 	# Ensure sources are downloaded
-	sudo -u "$makepkg_user" env SRCDEST="$SRCDEST" BUILDDIR="$builddir" \
+	sudo -u "$makepkg_user" --preserve-env=GNUPGHOME \
+		env SRCDEST="$SRCDEST" BUILDDIR="$builddir" \
 		makepkg --config="$copydir/etc/makepkg.conf" --verifysource -o ||
 		die "Could not download sources."
 
@@ -341,7 +343,7 @@ main() {
 	[[ -n $makepkg_user && -z $(id -u "$makepkg_user") ]] && die 'Invalid makepkg user.'
 	makepkg_user=${makepkg_user:-${SUDO_USER:-$USER}}
 
-	check_root SOURCE_DATE_EPOCH
+	check_root SOURCE_DATE_EPOCH,GNUPGHOME
 
 	# Canonicalize chrootdir, getting rid of trailing /
 	chrootdir=$(readlink -e "$passeddir")