dmq-node: static build

```
nix build .\#dmq-node-static
```

Author: angerman

flake.nix

@@ -52,6 +52,20 @@
             (import ./nix/tools.nix inputs)
             (import ./nix/ouroboros-network.nix inputs)
             (import ./nix/network-docs.nix inputs)
+            (final: _prev: {
+              static-libsodium-vrf = final.libsodium-vrf.overrideDerivation (old: {
+                configureFlags = old.configureFlags ++ [ "--disable-shared" ];
+              });
+              static-secp256k1 = final.secp256k1.overrideDerivation (old: {
+                configureFlags = old.configureFlags ++ [ "--enable-static" "--disable-shared" ];
+              });
+              static-gmp = (final.gmp.override { withStatic = true; }).overrideDerivation (old: {
+                configureFlags = old.configureFlags ++ [ "--enable-static" "--disable-shared" ];
+              });
+              static-libblst = (final.libblst.override { enableShared = false; }).overrideDerivation (_old: {
+                postFixup = "";
+              });
+            })
           ];
         };
 
@@ -116,6 +130,10 @@
           pkgs.setGitRev
             (inputs.self.rev or inputs.self.dirtyShortRev)
             flake.packages."dmq-node:exe:dmq-node";
+        packages.dmq-node-static =
+          pkgs.setGitRev
+            (inputs.self.rev or inputs.self.dirtyShortRev)
+            flake.packages."x86_64-unknown-linux-musl:dmq-node:exe:dmq-node";
         inherit hydraJobs legacyPackages devShells;
       }
     );

nix/ouroboros-network.nix

@@ -55,7 +55,7 @@ let
 
     # we also want cross compilation to windows on linux (and only with default compiler).
     crossPlatforms =
-      p: lib.optionals (pkgs.stdenv.hostPlatform.isLinux && config.compiler-nix-name == crossGHCVersion) [ p.ucrt64 ];
+      p: lib.optionals (pkgs.stdenv.hostPlatform.isLinux && config.compiler-nix-name == crossGHCVersion) [ p.ucrt64 p.musl64 ];
 
     #
     # VARIANTS
@@ -124,6 +124,14 @@ let
       ({ pkgs, ... }: lib.mkIf pkgs.stdenv.hostPlatform.isWindows {
         packages.basement.configureFlags = [ "--hsc2hs-options=--cflag=-Wno-int-conversion" ];
       })
+      ({ pkgs, ... }: lib.mkIf pkgs.stdenv.hostPlatform.isMusl {
+        packages.dmq-node.ghcOptions = with pkgs; [
+          "-L${lib.getLib static-gmp}/lib"
+          "-L${lib.getLib static-libsodium-vrf}/lib"
+          "-L${lib.getLib static-secp256k1}/lib"
+          "-L${lib.getLib static-libblst}/lib"
+        ];
+      })
     ];
   });
 in