diff --git a/nix/flake.nix b/nix/flake.nix
index 4d22d31..f5ee04f 100644
--- a/nix/flake.nix
+++ b/nix/flake.nix
@@ -39,11 +39,14 @@
         };
       });
       packages = forAllSystems (pkgs: {
-        tsm = pkgs.buildNimblePackage {
+        tsm = pkgs.buildNimblePackage rec {
           pname = "tsm";
-          version = "2024.1001";
+          version = "2024.1001-unstable";
           src = ../.;
-          nimbleDepsHash = "sha256-ugu+bNCWukWSALzD0/i73d0O2kty85J824tHsmfWRDI=";
+          nimbleDepsHash = "sha256-1J0Wt/XjFiSN1MTfgg9tE5dY3GnXH/UgG3zCL19GgpU=";
+          nimFlags = [
+            "-d:TsmVersion=v${version}"
+          ];
         };
         default = self.packages.${pkgs.system}.tsm;
       });
diff --git a/src/config.nim b/src/config.nim
index 96d60a3..e5f0c34 100644
--- a/src/config.nim
+++ b/src/config.nim
@@ -1,4 +1,4 @@
-import std/[os, sequtils, strformat, strutils, parsecfg, tables]
+import std/[os, sequtils, strformat, strutils, tables]
 import usu
 import term
 
diff --git a/src/tsm.nim b/src/tsm.nim
index 863cd25..b6aaeb2 100644
--- a/src/tsm.nim
+++ b/src/tsm.nim
@@ -14,10 +14,16 @@ proc tsm(open: bool = false) =
   else:
     tmux.attach project.name
 
+proc getVersion(): string =
+  const tsmVersion {.strdefine.} = "unknown"
+  const gitVersion = staticExec "git describe --tags --always HEAD --match 'v*'"
+  when tsmVersion != "unknown": tsmVersion
+  else: gitVersion
+
+
 when isMainModule:
   import cligen
-  const vsn = staticExec "git describe --tags --always HEAD --match 'v*'"
-  clCfg.version = vsn
+  clCfg.version = getVersion()
 
   if clCfg.helpAttr.len == 0:
     clCfg.helpAttr =