diff --git a/community/gnuradio/PKGBUILD b/community/gnuradio/PKGBUILD
index 60f65ac5d..2ded1d84e 100644
--- a/community/gnuradio/PKGBUILD
+++ b/community/gnuradio/PKGBUILD
@@ -8,7 +8,7 @@
 pkgbase=gnuradio
 pkgname=(gnuradio gnuradio-companion)
 pkgver=3.8.0.0
-pkgrel=3
+pkgrel=5
 pkgdesc="General purpose DSP and SDR toolkit.  With drivers for usrp and fcd."
 arch=('x86_64')
 url="https://gnuradio.org"
@@ -58,9 +58,9 @@ build() {
   cd build
   cmake \
     -DPYTHON_EXECUTABLE=$(which python3) \
-    -DPYTHON_INCLUDE_DIR=$(echo /usr/include/python3*) \
-    -DPYTHON_LIBRARY=$(echo /usr/lib/libpython3.*m.so) \
-    -DGR_PYTHON_DIR=$(echo /usr/lib/python3.*/site-packages/) \
+    -DPYTHON_INCLUDE_DIR=/usr/include/python3.8 \
+    -DPYTHON_LIBRARY=/usr/lib/libpython3.8.so \
+    -DGR_PYTHON_DIR=/usr/lib/python3.8/site-packages \
     -DENABLE_INTERNAL_VOLK=OFF \
     -DENABLE_GRC=ON \
     -DENABLE_GR_QTGUI=ON \