diff -Nur virt-manager-2.2.0.orig/virtinst/install/urldetect.py virt-manager-2.2.0/virtinst/install/urldetect.py
--- virt-manager-2.2.0.orig/virtinst/install/urldetect.py	2019-06-17 00:20:11.000000000 -0500
+++ virt-manager-2.2.0/virtinst/install/urldetect.py	2019-07-03 02:14:35.978571412 -0500
@@ -466,6 +466,47 @@
         return cache.treeinfo_family_regex(famregex)
 
 
+class SlackwareDistro(_DistroTree):
+    # slackware doesn't have installable URLs, so this is just for a
+    # mounted ISO
+    name = "Slackware"
+    urldistro = "slackware"
+    os_variant = "linux"
+
+    PRETTY_NAME = "Slackware"
+    matching_distros = ["slackware"]
+    _variant_prefix = "slackware"
+
+    _boot_iso_paths = []
+    _xen_kernel_paths = []
+
+    def __init__(self, *args, **kwargs):
+        Distro.__init__(self, *args, **kwargs)
+        if re.match(r'i[4-9]86', self.arch):
+            self.arch = 'i486'
+            self.kname = 'hugesmp.s'
+        else:
+            self.arch = 'x86_64'
+            self.kname = 'huge.s'
+
+        self._hvm_kernel_paths = [("kernels/%s/bzImage" % self.kname,
+                                    "isolinux/initrd.img")]
+
+    def isValidStore(self):
+        # Don't support any paravirt installs
+        if self.type is not None and self.type != "hvm":
+            return False
+
+        # Slackware website / media appear to have a Slackware-HOWTO
+        # file in top level which we can use as our 'magic'
+        # check for validity
+        if not self.fetcher.hasFile("Slackware-HOWTO"):
+            return False
+
+        logging.debug("Regex didn't match, not a %s distro", self.name)
+        return False
+
+
 class _SuseDistro(_RHELDistro):
     PRETTY_NAME = None
     _suse_regex = []