diff --git a/pkgs/development/nim-packages/base45/default.nix b/pkgs/development/nim-packages/base45/default.nix
new file mode 100644
index 000000000000..b63f3073e774
--- /dev/null
+++ b/pkgs/development/nim-packages/base45/default.nix
@@ -0,0 +1,19 @@
+{ lib, buildNimPackage, fetchFromSourcehut }:
+
+buildNimPackage rec {
+  pname = "base45";
+  version = "20230124";
+  src = fetchFromSourcehut {
+    owner = "~ehmry";
+    repo = pname;
+    rev = version;
+    hash = "sha256-9he+14yYVGt2s1IuRLPRsv23xnJzERkWRvIHr3PxFYk=";
+  };
+  doCheck = true;
+  meta = src.meta // {
+    description = "Base45 library for Nim";
+    license = lib.licenses.unlicense;
+    mainProgram = pname;
+    maintainers = with lib.maintainers; [ ehmry ];
+  };
+}
diff --git a/pkgs/top-level/nim-packages.nix b/pkgs/top-level/nim-packages.nix
index 67863c3ac06d..ddd33e151ebf 100644
--- a/pkgs/top-level/nim-packages.nix
+++ b/pkgs/top-level/nim-packages.nix
@@ -18,6 +18,8 @@ lib.makeScope newScope (self:
 
     base32 = callPackage ../development/nim-packages/base32 { };
 
+    base45 = callPackage ../development/nim-packages/base45 { };
+
     bumpy = callPackage ../development/nim-packages/bumpy { };
 
     c2nim = callPackage ../development/nim-packages/c2nim { };