diff --git a/manifest.dhall b/manifest.dhall
index 8f6528d41a44ba325c4b4c2d561413b180f40968..b062778e9f93e52cb872d0db38280c378d0f5474 100644
--- a/manifest.dhall
+++ b/manifest.dhall
@@ -600,6 +600,7 @@ in  [ callHackage "Cabal" "3.8.1.0"
     , callHackage "servant-swagger-ui" "0.3.5.4.5.0"
     , callHackage "servant-swagger-ui-core" "0.3.5"
     , callHackage "servant-static-th" "1.0.0.0"
+    , callHackage "setenv" "0.1.1.3"
     , callHackage "shakespeare" "2.0.30"
     , callHackage "shake" "0.19.6"
     , callHackage "shelly" "1.10.0"
diff --git a/overlay.nix b/overlay.nix
index 1af6281100f7082d2327e66b3cf0a6fd81c5ebf2..0cc5aac2e89ce6338a9a43e3c342ee1f2f1d4638 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -875,6 +875,8 @@ self: with pkgs.haskell.lib; {
 
   servant-swagger-ui-core = self.callPackage (./pkgs/servant-swagger-ui-core.nix) { };
 
+  setenv = self.callPackage (./pkgs/setenv.nix) { };
+
   shake = self.callPackage (./pkgs/shake.nix) { };
 
   shakespeare = self.callPackage (./pkgs/shakespeare.nix) { };
diff --git a/pkgs/setenv.nix b/pkgs/setenv.nix
new file mode 100644
index 0000000000000000000000000000000000000000..00e9536a1f222a37b3e0acbf9ed8c0dd37085b0b
--- /dev/null
+++ b/pkgs/setenv.nix
@@ -0,0 +1,22 @@
+{ mkDerivation, base, lib, unix }:
+mkDerivation {
+  pname = "setenv";
+  version = "0.1.1.3";
+  sha256 = "e358df39afc03d5a39e2ec650652d845c85c80cc98fe331654deafb4767ecb32";
+  revision = "1";
+  editedCabalFile = "0ny4g3kjys0hqg41mnwrsymy1bwhl8l169kis4y4fa58sb06m4f5";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [ base unix ];
+  enableLibraryProfiling = false;
+  enableExecutableProfiling = false;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  description = "A cross-platform library for setting environment variables";
+  license = lib.licenses.mit;
+  broken = false;
+}