nix: migrate to pname+version

.devops/nix/package.nix

@@ -24,13 +24,15 @@
   useMetalKit ? stdenv.isAarch64 && stdenv.isDarwin && !useOpenCL,
   useOpenCL ? false,
   useRocm ? config.rocmSupport,
+  llamaVersion ? "0.0.0", # Arbitrary version, substituted by the flake
 }@inputs:
 
 let
   inherit (lib)
     cmakeBool
     cmakeFeature
     optionals
+    strings
     versionOlder
     ;
 
@@ -39,18 +41,19 @@ let
   stdenv = throw "Use effectiveStdenv instead";
   effectiveStdenv = if useCuda then cudaPackages.backendStdenv else inputs.stdenv;
 
-  # Give a little description difference between the flavors.
+  suffices =
+    lib.optionals useOpenCL [ "OpenCL" ]
+    ++ lib.optionals useCuda [ "CUDA" ]
+    ++ lib.optionals useRocm [ "ROCm" ]
+    ++ lib.optionals useMetalKit [ "MetalKit" ]
+    ++ lib.optionals useBlas [ "BLAS" ];
+
+  pnameSuffix =
+    strings.optionalString (suffices != [ ])
+      "-${strings.concatMapStringsSep "-" strings.toLower suffices}";
   descriptionSuffix =
-    if useOpenCL then
-      " (OpenCL accelerated)"
-    else if useCuda then
-      " (CUDA accelerated)"
-    else if useRocm then
-      " (ROCm accelerated)"
-    else if useMetalKit then
-      " (MetalKit accelerated)"
-    else
-      "";
+    strings.optionalString (suffices != [ ])
+      ", accelerated with ${strings.concatStringsSep ", " suffices}";
 
   # TODO: package the Python in this repository in a Nix-like way.
   # It'd be nice to migrate to buildPythonPackage, as well as ensure this repo
@@ -99,7 +102,9 @@ in
 
 effectiveStdenv.mkDerivation (
   finalAttrs: {
-    name = "llama.cpp";
+    pname = "llama-cpp${pnameSuffix}";
+    version = llamaVersion;
+
     src = ../../.;
 
     postPatch = ''
@@ -171,14 +176,14 @@ effectiveStdenv.mkDerivation (
         ;
 
       shell = mkShell {
-        name = "default${descriptionSuffix}";
+        name = "shell-${finalAttrs.finalPackage.name}";
         description = "contains numpy and sentencepiece";
         buildInputs = [ llama-python ];
         inputsFrom = [ finalAttrs.finalPackage ];
       };
 
       shell-extra = mkShell {
-        name = "extra${descriptionSuffix}";
+        name = "shell-extra-${finalAttrs.finalPackage.name}";
         description = "contains numpy, sentencepiece, torchWithoutCuda, and transformers";
         buildInputs = [ llama-python-extra ];
         inputsFrom = [ finalAttrs.finalPackage ];

.devops/nix/scope.nix

@@ -1,3 +1,12 @@
-{ lib, newScope }:
+{
+  lib,
+  newScope,
+  llamaVersion ? "0.0.0",
+}:
 
-lib.makeScope newScope (self: { llama-cpp = self.callPackage ./package.nix { }; })
+lib.makeScope newScope (
+  self: {
+    inherit llamaVersion;
+    llama-cpp = self.callPackage ./package.nix { };
+  }
+)

flake.nix

@@ -16,7 +16,10 @@
   # { program = "/nix/store/00000000000000000000000000000000-llama.cpp/bin/quantize"; type = "app"; }
   # ```
   outputs =
-    { flake-parts, ... }@inputs:
+    { self, flake-parts, ... }@inputs:
+    let
+      llamaVersion = self.dirtyShortRev or self.shortRev;
+    in
     flake-parts.lib.mkFlake { inherit inputs; }
 
       {
@@ -48,7 +51,9 @@
         #
         # Cf. https://nixos.org/manual/nix/unstable/command-ref/new-cli/nix3-flake.html?highlight=flake#flake-format
         flake.overlays.default =
-          (final: prev: { llamaPackages = final.callPackage .devops/nix/scope.nix { }; });
+          (final: prev: {
+            llamaPackages = final.callPackage .devops/nix/scope.nix { inherit llamaVersion; };
+          });
 
         systems = [
           "aarch64-darwin"
@@ -69,10 +74,10 @@
             # We don't use the overlay here so as to avoid making too many instances of nixpkgs,
             # cf. https://zimbatm.com/notes/1000-instances-of-nixpkgs
             packages = {
-              default = (pkgs.callPackage .devops/nix/scope.nix { }).llama-cpp;
+              default = (pkgs.callPackage .devops/nix/scope.nix { inherit llamaVersion; }).llama-cpp;
               opencl = config.packages.default.override { useOpenCL = true; };
-              cuda = (pkgsCuda.callPackage .devops/nix/scope.nix { }).llama-cpp;
-              rocm = (pkgsRocm.callPackage .devops/nix/scope.nix { }).llama-cpp;
+              cuda = (pkgsCuda.callPackage .devops/nix/scope.nix { inherit llamaVersion; }).llama-cpp;
+              rocm = (pkgsRocm.callPackage .devops/nix/scope.nix { inherit llamaVersion; }).llama-cpp;
             };
           };
       };