Haskell : Create Hello World.

.gitignore

@@ -1 +1,2 @@
 .NixRoot*
+build/

haskell/Hello.hs

@@ -0,0 +1,3 @@
+main = do
+	putStrLn "Hello, everybody!"
+	putStrLn ("Please look at my favorite odd numbers: " ++ show (filter odd [10..20]))

haskell/Makefile

@@ -0,0 +1,19 @@
+main  = "Hello.hs"
+build = "build"
+elf   = "$(build)/elf"
+
+.PHONY: all
+all: clean build run
+
+.PHONY: clean
+clean:
+	@rm -rf $(build)
+
+.PHONY: build
+build:
+	@mkdir $(build) &> /dev/null; \
+		ghc -outputdir $(build) -o $(elf) $(main)
+
+.PHONY: run
+run:
+	@./$(elf)

haskell/flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1709961763,
+        "narHash": "sha256-6H95HGJHhEZtyYA3rIQpvamMKAGoa8Yh2rFV29QnuGw=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3030f185ba6a4bf4f18b87f345f104e6a6961f34",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}