diff --git a/README.md b/README.md
index 2e79f40..9e8f930 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ in the RESF (such as Rocky Linux).
   * CentOS Stream 8, 9+ recommended
 
 * Python 3.6 or higher - Python 3.9+ recommended
+* rpm-build
 * A few python modules
 
   * file-magic (python3-file-magic)
@@ -22,7 +23,7 @@ in the RESF (such as Rocky Linux).
   * rpm (python3-rpm)
   * pycurl (python3-pycurl)
 
-* rpm macros packages
+* rpm macros packages (brought in by rpm-build package)
 
   * \*-rpm-macros
   * \*-srpm-macros
diff --git a/pv2/importer/operation.py b/pv2/importer/operation.py
index 33beec5..9231840 100644
--- a/pv2/importer/operation.py
+++ b/pv2/importer/operation.py
@@ -58,6 +58,9 @@ class Import:
         """
         Packs an srpm from available sources
         """
+        if not os.path.exists('/usr/bin/rpmbuild'):
+            raise err.FileNotFound('rpmbuild command is missing')
+
         command_to_send = [
                 'rpmbuild',
                 '-bs',