fix cowsay problem

source/new-flake/bash-flake/flake-6.nix

@@ -0,0 +1,63 @@
+{
+  description = "what does the cow say";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" ];
+
+      forEachSystem = nixpkgs.lib.genAttrs supportedSystems;
+
+      nixpkgsFor = forEachSystem (system: import nixpkgs {
+        inherit system;
+        config = { };
+        overlays = [ ];
+      });
+
+    in {
+
+      devShells = forEachSystem (system:
+        let pkgs = nixpkgsFor.${system}; in {
+          default = pkgs.mkShell {
+              packages = [ pkgs.cowsay ];
+          };
+      });
+
+      packages = forEachSystem (system:
+        let pkgs = nixpkgsFor.${system}; in rec {
+          hello = pkgs.stdenv.mkDerivation {
+            name = "cow-hello.sh";
+            src = ./.;
+            unpackPhase = "true";
+            buildPhase = ":";
+            installPhase =
+              ''
+                mkdir -p $out/bin
+                cp $src/cow-hello.sh $out/bin
+                chmod +x $out/bin/cow-hello.sh
+
+                # modify the cow-hello.sh script so it can find cowsay
+                COWSAY=$(type -p cowsay)
+                sed "s_cowsay_"$COWSAY"_" --in-place $out/bin/cow-hello.sh
+              '';
+            buildInputs = [ pkgs.cowsay ];
+          }; # mkDerivation
+
+          default = hello;
+      }); # packages
+
+      apps = forEachSystem (system:
+        let pkgs = nixpkgsFor.${system}; in rec {
+          hello = {
+            type = "app";
+            program = pkgs.lib.getExe self.packages.${system}.hello;
+          };
+
+          default = hello;
+      });
+  }; # outputs
+}

source/recipes/build/nixpkg/tempwork/flake.lock

@@ -1,60 +0,0 @@
-{
-  "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1760435515,
-        "narHash": "sha256-E9D5sWHmPCmWsrCB3Jogvr/7ODiVaKynDrOpG4ba2tI=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "db25466bd95abdbe3012be2900a5562fcfb95d51",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

source/recipes/build/nixpkg/tempwork/flake.nix

@@ -1,42 +0,0 @@
-{
-  description = "a very simple and friendly flake";
-
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs";
-    flake-utils.url = "github:numtide/flake-utils";
-  };
-
-  outputs = { self, nixpkgs, flake-utils }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = import nixpkgs { inherit system; };
-      in
-      {
-        devShells = rec {
-          default = pkgs.mkShell {
-            packages = [ pkgs.cowsay ];
-          };
-        };
-
-        packages = rec {
-          hello = pkgs.writeShellApplication {
-            name = "hello-cow";
-
-            runtimeInputs = [
-              pkgs.cowsay
-            ];
-
-            text = ''
-              cowsay "hello";
-            '';
-          };
-          default = hello;
-        };
-
-        apps = rec {
-          hello = flake-utils.lib.mkApp { drv = self.packages.${system}.hello; };
-          default = hello;
-        };
-      }
-    );
-}