diff --git a/utils.go b/utils.go
index f010cc0..43b4032 100644
--- a/utils.go
+++ b/utils.go
@@ -276,6 +276,17 @@ func (p *BuildPackage) repoVersion() (string, error) {
 }
 
 func (p *BuildPackage) increasePkgRel(buildNo int) error {
+	if p.Srcinfo == nil {
+		err := p.genSrcinfo()
+		if err != nil {
+			return fmt.Errorf("error generating srcinfo: %v", err)
+		}
+	}
+
+	if p.Version == "" {
+		p.Version = constructVersion(p.Srcinfo.Pkgver, p.Srcinfo.Pkgrel, p.Srcinfo.Epoch)
+	}
+
 	f, err := os.OpenFile(p.Pkgbuild, os.O_RDWR, 0644)
 	if err != nil {
 		return err
@@ -670,10 +681,10 @@ func (p *BuildPackage) genSrcinfo() error {
 		return nil
 	}
 
-	cmd := exec.Command("sh", "-c", "cd "+filepath.Dir(p.Pkgbuild)+"&&"+"makepkg --printsrcinfo")
-	res, err := cmd.Output()
+	cmd := exec.Command("sh", "-c", "cd "+filepath.Dir(p.Pkgbuild)+"&&"+"makepkg --printsrcinfo -p "+filepath.Base(p.Pkgbuild))
+	res, err := cmd.CombinedOutput()
 	if err != nil {
-		return err
+		return fmt.Errorf("makepkg exit non-zero (PKGBUILD: %s): %v (%s)", p.Pkgbuild, err, string(res))
 	}
 
 	info, err := srcinfo.Parse(string(res))
diff --git a/utils_test.go b/utils_test.go
new file mode 100644
index 0000000..32fc0d2
--- /dev/null
+++ b/utils_test.go
@@ -0,0 +1,97 @@
+package main
+
+import (
+	"os"
+	"strings"
+	"testing"
+)
+
+const PkgbuildTest = `# Maintainer: Jan Alexander Steffens (heftig) <heftig@archlinux.org>
+
+pkgname=gnome-todo
+pkgver=41.0+r69+ga9a5b7cd
+pkgrel=1
+pkgdesc="Task manager for GNOME"
+url="https://wiki.gnome.org/Apps/Todo"
+arch=(x86_64)
+license=(GPL)
+depends=(evolution-data-server libpeas python gtk4 libportal-gtk4 libadwaita)
+makedepends=(gobject-introspection appstream-glib git meson yelp-tools)
+groups=(gnome-extra)
+_commit=a9a5b7cdde0244331d2d49220f04018be60c018e  # master
+source=("git+https://gitlab.gnome.org/GNOME/gnome-todo.git#commit=$_commit")
+sha256sums=('SKIP')
+
+pkgver() {
+  cd $pkgname
+  git describe --tags | sed 's/^GNOME_TODO_//;s/_/./g;s/[^-]*-g/r&/;s/-/+/g'
+
+}
+
+prepare() {
+  cd $pkgname
+}
+
+build() {
+  arch-meson $pkgname build
+  meson compile -C build
+}
+
+check() (
+  glib-compile-schemas "${GSETTINGS_SCHEMA_DIR:=$PWD/$pkgname/data}"
+  export GSETTINGS_SCHEMA_DIR
+
+  meson test -C build --print-errorlogs
+)
+
+package() {
+  meson install -C build --destdir "$pkgdir"
+}
+
+# vim:set sw=2 et:
+`
+
+func TestIncreasePkgRel(t *testing.T) {
+	pkgbuild, err := os.CreateTemp("", "")
+	if err != nil {
+		t.Fatal("Unable to setup temp. PKGBUILD")
+	}
+	defer func(name string) {
+		_ = os.Remove(name)
+	}(pkgbuild.Name())
+
+	_, err = pkgbuild.WriteString(PkgbuildTest)
+	if err != nil {
+		t.Fatal("Unable to write to temp. PKGBUILD")
+	}
+	_ = pkgbuild.Close()
+
+	buildPkg := &BuildPackage{
+		Pkgbase:  "gnome-todo",
+		Pkgbuild: pkgbuild.Name(),
+	}
+
+	err = buildPkg.increasePkgRel(1)
+	if err != nil {
+		t.Logf("increasePkgRel: %v", err)
+		t.Fail()
+	}
+
+	versionSplit := strings.Split(buildPkg.Version, "-")
+	if versionSplit[len(versionSplit)-1] != "1.1" {
+		t.Logf("increasePkgRel: expected 1.1 pkgrel, got: %s", buildPkg.Version)
+		t.Fail()
+	}
+
+	buildPkg.Srcinfo = nil
+	err = buildPkg.genSrcinfo()
+	if err != nil {
+		t.Logf("increasePkgRel: %v", err)
+		t.Fail()
+	}
+
+	if buildPkg.Srcinfo.Pkgrel != "1.1" {
+		t.Logf("increasePkgRel: expected 1.1 pkgrel, got: %s", buildPkg.Srcinfo.Pkgrel)
+		t.Fail()
+	}
+}