diff --git a/build.zig b/build.zig
index 56883ba..798d76e 100644
--- a/build.zig
+++ b/build.zig
@@ -124,6 +124,21 @@ fn getVersion(b: *std.Build) std.SemanticVersion {
             }
             return totp_version;
         },
+        1 => {
+            // prerelease version: 1.0.0-dev
+            var iter = std.mem.splitScalar(u8, output_trimmed, '-');
+            const tag = iter.first();
+            const pre_release = iter.next().?;
+
+            const v: std.SemanticVersion = std.SemanticVersion.parse(tag) catch unreachable;
+
+            return .{
+                .major = v.major,
+                .minor = v.minor,
+                .patch = v.patch,
+                .pre = b.fmt("{s}", .{pre_release}),
+            };
+        },
         2 => {
             // development version, e.g. 1.0.0-7-64es356
             var iter = std.mem.splitScalar(u8, output_trimmed, '-');