diff --git a/slpkg/pkg/build.py b/slpkg/pkg/build.py
index b784814b..0bdeebf2 100644
--- a/slpkg/pkg/build.py
+++ b/slpkg/pkg/build.py
@@ -79,6 +79,8 @@ class BuildPackage(object):
             if not self.auto:
                 os.chdir(self._SOURCES)
             for src in self.sources:
+                if not os.path.isfile(src):
+                    continue
                 # fix build sources with spaces
                 src = src.replace("%20", " ")
                 check_md5(self.sbo_md5[src], src)
diff --git a/slpkg/sbo/slack_find.py b/slpkg/sbo/slack_find.py
index ec46879d..54e5565a 100644
--- a/slpkg/sbo/slack_find.py
+++ b/slpkg/sbo/slack_find.py
@@ -43,5 +43,5 @@ def slack_package(prgnam):
             cache = binary
     if not binary:
         Msg().build_FAILED(prgnam)
-        raise SystemExit()
+        # raise SystemExit()
     return ["".join(_meta_.output + binary)]
diff --git a/slpkg/sbo/slackbuild.py b/slpkg/sbo/slackbuild.py
index e262e840..953e9f6c 100644
--- a/slpkg/sbo/slackbuild.py
+++ b/slpkg/sbo/slackbuild.py
@@ -335,15 +335,16 @@ class SBoInstall(object):
                 BuildPackage(script, sources, self.build_folder,
                              auto=False).build()
                 binary = slack_package(prgnam)
-                if GetFromInstalled(pkg).name() == pkg:
-                    print("[ {0}Upgrading{1} ] --> {2}".format(
-                        self.meta.color["YELLOW"],
-                        self.meta.color["ENDC"], prgnam))
-                    upgraded.append(prgnam)
-                else:
-                    print("[ {0}Installing{1} ] --> {2}".format(
-                        self.meta.color["GREEN"],
-                        self.meta.color["ENDC"], prgnam))
-                    installs.append(prgnam)
-                PackageManager(binary).upgrade(flag="--install-new")
+                if os.path.isfile("".join(binary)):
+                    if GetFromInstalled(pkg).name() == pkg:
+                        print("[ {0}Upgrading{1} ] --> {2}".format(
+                            self.meta.color["YELLOW"],
+                            self.meta.color["ENDC"], prgnam))
+                        upgraded.append(prgnam)
+                    else:
+                        print("[ {0}Installing{1} ] --> {2}".format(
+                            self.meta.color["GREEN"],
+                            self.meta.color["ENDC"], prgnam))
+                        installs.append(prgnam)
+                    PackageManager(binary).upgrade(flag="--install-new")
         return installs, upgraded