1 files changed, 25 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/chicken/4/fetchegg/default.nix b/nixpkgs/pkgs/development/compilers/chicken/4/fetchegg/default.nix
new file mode 100644
index 000000000000..d4d33a5593c3
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/chicken/4/fetchegg/default.nix
@@ -0,0 +1,25 @@
+# Fetches a chicken egg from henrietta using `chicken-install -r'
+# See: http://wiki.call-cc.org/chicken-projects/egg-index-4.html
+
+{ stdenvNoCC, chicken }:
+{ name, version, md5 ? "", sha256 ? "" }:
+
+if md5 != "" then
+  throw "fetchegg does not support md5 anymore, please use sha256"
+else
+stdenvNoCC.mkDerivation {
+  name = "chicken-${name}-export-${version}";
+  builder = ./builder.sh;
+  nativeBuildInputs = [ chicken ];
+
+  outputHashAlgo = "sha256";
+  outputHashMode = "recursive";
+  outputHash = sha256;
+
+  inherit version;
+
+  eggName = name;
+
+  impureEnvVars = stdenvNoCC.lib.fetchers.proxyImpureEnvVars;
+}
+