--- repology.d.orig	2025-02-11 04:00:24.000000000 +0200
+++ repology.d	2026-05-01 15:47:06.450022291 +0300
@@ -68,44 +68,43 @@
                 break;
             }
         }
-        if (!options.repo)
-            stderr.writeln("repology: specify your repo with the --repo flag");
     } else version (linux) {
         import std.file;
         import std.string;
         string distro, release;
-        string[] lines = splitLines(cast(string)read("/etc/os-release"));
-        foreach (line; lines) {
-            if (line.startsWith("ID=")) {
-                auto id = line.split("=");
-                distro = id[1].idup;
-            } else if (line.startsWith("VERSION_ID=")) {
-                auto versionid = line.split("=");
-                release = versionid[1].idup;
+        try {
+            string[] lines = splitLines(cast(string)read("/etc/os-release"));
+            foreach (line; lines) {
+                if (line.startsWith("ID=")) {
+                    auto id = line.split("=");
+                    distro = id[1].idup;
+                } else if (line.startsWith("VERSION_ID=")) {
+                    auto versionid = line.split("=");
+                    release = versionid[1].idup;
+                }
             }
-        }
-        switch (distro) {
-        case "alpine":
-            options.repo = distro ~ "_edge";
-            break;
-        case "debian":
-            options.repo = distro ~ "_unstable";
-            break;
-        case "fedora":
-            options.repo = distro ~ "_rawhide";
-            break;
-        case "gentoo":
-            options.repo = distro;
-            break;
-        case "ubuntu":
-            options.repo = distro ~ "_" ~
-                release.strip("\"").replaceFirst(".", "_");
-            break;
-        default:
-            stderr.writeln("repology: specify your repo with the --repo flag");
-        }
-    } else {
-        stderr.writeln("repology: specify your repo with the --repo flag");
+            final switch (distro) {
+            case "alpine":
+                options.repo = distro ~ "_edge";
+                break;
+            case "debian":
+                options.repo = distro ~ "_unstable";
+                break;
+            case "fedora":
+                options.repo = distro ~ "_rawhide";
+                break;
+            case "gentoo":
+                options.repo = distro;
+                break;
+            case "ubuntu":
+                options.repo = distro ~ "_" ~
+                    release.strip("\"").replaceFirst(".", "_");
+                break;
+            case "slackware":
+                options.repo = "slackbuilds";
+                break;
+            }
+        } catch (std.file.FileException) {}
     }
 
     auto opts = getopt(
@@ -141,6 +140,11 @@
         return 1;
     }
 
+    if (!options.repo) {
+        stderr.writeln("repology: specify your repo with the --repo flag");
+        return 1;
+    }
+
     switch (options.repo) {
     case "alpine":
         options.repo = "alpine_edge";