diff --git a/NEWS b/NEWS
index 660bdb778ba..12bd66c515e 100644
--- a/NEWS
+++ b/NEWS
@@ -7,7 +7,7 @@
 ##
 #
 
-## 1.8.1-RC2 (July 2, 2020)
+## 1.8.1-rc4 (July 7, 2020)
 ### Features:
 - Added binary release pipeline in Azure CI
 
diff --git a/buildlib/azure-pipelines-pr.yml b/buildlib/azure-pipelines-pr.yml
index e27d2ad1698..b261931c5e9 100644
--- a/buildlib/azure-pipelines-pr.yml
+++ b/buildlib/azure-pipelines-pr.yml
@@ -131,7 +131,7 @@ stages:
 
       # Test RPM build
       - job: build_rpm
-        displayName: build tarball and source rpm
+        displayName: Build tarball and source rpm
         container: fedora
         steps:
           - checkout: self
@@ -144,8 +144,15 @@ stages:
               set -eE
               gcc --version
               ./contrib/configure-release
-              ./contrib/buildrpm.sh -s -t -b
-            displayName: Build tarball
+              stdbuf -e0 -o0 ./contrib/buildrpm.sh -s -t -b |& tee rpmbuild.log
+              pattern='^warning: '
+              if grep -q "$pattern" rpmbuild.log; then
+                echo "rpm build generated warnings:"
+                grep "$pattern" rpmbuild.log
+                echo "##vso[task.logissue type=error]rpm build generated warnings"
+                echo "##vso[task.complete result=Failed;]"
+              fi
+            displayName: Configure source and build RPM
 
   - stage: Tests
     dependsOn: [Codestyle]
diff --git a/ucx.spec.in b/ucx.spec.in
index 8ce6ac9a607..4edc1b20abc 100644
--- a/ucx.spec.in
+++ b/ucx.spec.in
@@ -300,7 +300,7 @@ process to map the memory of another process into its virtual address space.
 
 
 %changelog
-* Thu Jul 1 2020 Yossi Itigin <yosefe@mellanox.com> 1.8.1-1
+* Wed Jul 1 2020 Yossi Itigin <yosefe@mellanox.com> 1.8.1-1
 - Bump version to 1.8.1
 * Sun Sep 22 2019 Yossi Itigin <yosefe@mellanox.com> 1.8.0-1
 - Bump version to 1.8.0