diff --git a/builder/stage4/05-pisdr-uhd/00-run.sh b/builder/stage4/05-pisdr-uhd/00-run.sh
index 35b73f5..afe1575 100755
--- a/builder/stage4/05-pisdr-uhd/00-run.sh
+++ b/builder/stage4/05-pisdr-uhd/00-run.sh
@@ -15,8 +15,10 @@ cd build
 cmake -DCMAKE_CXX_FLAGS:STRING="-march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a15 -Wno-psabi" \
       -DCMAKE_C_FLAGS:STRING="-march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a15 -Wno-psabi" \
       -DCMAKE_ASM_FLAGS:STRING="-march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a15" \
-      -GNinja -DCMAKE_BUILD_TYPE=Release ../
+      -GNinja -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr ../
 ninja install
+cp /usr/lib/uhd/utils/uhd-usrp.rules /etc/udev/rules.d/
+udevadm control --reload-rules
+udevadm trigger
 ldconfig
-EOF
-
+EOF
\ No newline at end of file
diff --git a/builder/stage4/06-pisdr-gnuradio/00-run.sh b/builder/stage4/06-pisdr-gnuradio/00-run.sh
index 5c27f85..c164fa9 100755
--- a/builder/stage4/06-pisdr-gnuradio/00-run.sh
+++ b/builder/stage4/06-pisdr-gnuradio/00-run.sh
@@ -13,9 +13,7 @@ git checkout maint-3.8
 git submodule update --init --recursive
 mkdir -p build
 cd build
-echo "export PYTHONPATH=/usr/local/lib/python3/dist-packages:\$PYTHONPATH" >> /home/${FIRST_USER_NAME}/.bashrc
-cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DPYTHON_EXECUTABLE=/usr/bin/python3 ..
+cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr ..
 ninja install
 ldconfig
-EOF
-
+EOF
\ No newline at end of file