diff --git a/extra/openmpi4/PKGBUILD b/extra/openmpi4/PKGBUILD
index ac56a4c2c..92a11d291 100644
--- a/extra/openmpi4/PKGBUILD
+++ b/extra/openmpi4/PKGBUILD
@@ -10,6 +10,7 @@
 buildarch=4
 
 pkgname=openmpi4
+_pkgname=openmpi
 pkgver=4.1.6
 pkgrel=3
 pkgdesc='High performance message passing library (MPI)'
@@ -49,7 +50,7 @@ provides=(
   libopen-rte.so
 )
 source=(
-  https://www.open-mpi.org/software/ompi/v${pkgver%.*}/downloads/$pkgname-$pkgver.tar.bz2)
+  https://www.open-mpi.org/software/ompi/v${pkgver%.*}/downloads/$_pkgname-$pkgver.tar.bz2)
 sha256sums=('f740994485516deb63b5311af122c265179f5328a0d857a567b85db00b11e415')
 b2sums=('4f119e1ed9b8787f0f860295ab1721fe2fd5300b8e182230a9eba3a864680b02bbd30618cc6d798a693a121626fc0ad5f447144d9ba91becb734f1a530d7a23a')
 
@@ -62,13 +63,13 @@ build() {
     --enable-mpi-fortran=all
     --enable-pretty-print-stacktrace
     --libdir=/usr/lib
-    --sysconfdir=/etc/$pkgname
+    --sysconfdir=/etc/$_pkgname
     --with-hwloc=external
     --with-libevent=external
     --with-pmix=external
     --with-valgrind
   )
-  cd $pkgname-$pkgver
+  cd $_pkgname-$pkgver
 
   # set environment variables for reproducible build
   # see https://github.com/open-mpi/ompi/blob/main/docs/release-notes/general.rst
@@ -84,14 +85,14 @@ build() {
 }
 
 check() {
-  make check -C $pkgname-$pkgver
+  make check -C $_pkgname-$pkgver
 }
 
 package() {
   depends+=(libpmix.so)
 
-  make DESTDIR="$pkgdir" install -C $pkgname-$pkgver
-  install -Dm 644 $pkgname-$pkgver/LICENSE -t "$pkgdir/usr/share/licenses/$pkgname/"
+  make DESTDIR="$pkgdir" install -C $_pkgname-$pkgver
+  install -Dm 644 $_pkgname-$pkgver/LICENSE -t "$pkgdir/usr/share/licenses/$_pkgname/"
 }
 
 # vim: ts=2 sw=2 et: