diff --git a/pkgs/by-name/ni/ninja/package.nix b/pkgs/by-name/ni/ninja/package.nix
index d776c546f1e4..fe89a9c1e670 100644
--- a/pkgs/by-name/ni/ninja/package.nix
+++ b/pkgs/by-name/ni/ninja/package.nix
@@ -17,26 +17,25 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "ninja";
-  version = lib.removePrefix "v" finalAttrs.src.rev;
-
-  src =
+  version =
     {
-      # TODO: Remove Ninja 1.11 as soon as possible.
-      "1.11" = fetchFromGitHub {
-        owner = "ninja-build";
-        repo = "ninja";
-        rev = "v1.11.1";
-        hash = "sha256-LvV/Fi2ARXBkfyA1paCRmLUwCh/rTyz+tGMg2/qEepI=";
-      };
-
-      latest = fetchFromGitHub {
-        owner = "ninja-build";
-        repo = "ninja";
-        rev = "v1.12.1";
-        hash = "sha256-RT5u+TDvWxG5EVQEYj931EZyrHUSAqK73OKDAascAwA=";
-      };
+      "1.11" = "1.11.1";
+      latest = "1.12.1";
     }
-    .${ninjaRelease} or (throw "Unsupported Ninja release: ${ninjaRelease}");
+    .${ninjaRelease};
+
+  src = fetchFromGitHub {
+    owner = "ninja-build";
+    repo = "ninja";
+    rev = "v${finalAttrs.version}";
+    hash =
+      {
+        # TODO: Remove Ninja 1.11 as soon as possible.
+        "1.11" = "sha256-LvV/Fi2ARXBkfyA1paCRmLUwCh/rTyz+tGMg2/qEepI=";
+        latest = "sha256-RT5u+TDvWxG5EVQEYj931EZyrHUSAqK73OKDAascAwA=";
+      }
+      .${ninjaRelease} or (throw "Unsupported Ninja release: ${ninjaRelease}");
+  };
 
   depsBuildBuild = [ buildPackages.stdenv.cc ];