diff --git a/flake.nix b/flake.nix
index eab982de5d..514292f758 100644
--- a/flake.nix
+++ b/flake.nix
@@ -47,6 +47,24 @@
               > $out/nix-support/hydra-build-products
         '';
       }); in
+      let iosPostInstall = bundleName: ''
+        ${pkgs.tree}/bin/tree $out
+        mkdir -p $out/_pkg
+        # copy over includes, we might want those, but maybe not.
+        # cp -r $out/lib/*/*/include $out/_pkg/
+        # find the libHS...ghc-X.Y.Z.a static library; this is the
+        # rolled up one with all dependencies included.
+        find ./dist -name "libHS*.a" -exec cp {} $out/_pkg \;
+        find ${pkgs.libffi.overrideAttrs (old: { dontDisableStatic = true; })}/lib -name "*.a" -exec cp {} $out/_pkg \;
+        find ${pkgs.gmp6.override { withStatic = true; }}/lib -name "*.a" -exec cp {} $out/_pkg \;
+        # There is no static libc
+        ${pkgs.tree}/bin/tree $out/_pkg
+        (cd $out/_pkg; ${pkgs.zip}/bin/zip -r -9 $out/${bundleName}.zip *)
+        rm -fR $out/_pkg
+        mkdir -p $out/nix-support
+        echo "file binary-dist \"$(echo $out/*.zip)\"" \
+            > $out/nix-support/hydra-build-products
+      ''; in
       rec {
         packages = {
             "lib:simplex-chat" = (drv pkgs).simplex-chat.components.library;
@@ -225,24 +243,7 @@
                 # for iOS we also use -staticlib, to get one rolled up library.
                 # still needs mac2ios patching of the archives.
                 ghcOptions = [ "-staticlib" "-threaded" "-DIOS" ];
-                postInstall = ''
-                  ${pkgs.tree}/bin/tree $out
-                  mkdir -p $out/_pkg
-                  # copy over includes, we might want those, but maybe not.
-                  # cp -r $out/lib/*/*/include $out/_pkg/
-                  # find the libHS...ghc-X.Y.Z.a static library; this is the
-                  # rolled up one with all dependencies included.
-                  find ./dist -name "libHS*.a" -exec cp {} $out/_pkg \;
-                  find ${pkgs.libffi.overrideAttrs (old: { dontDisableStatic = true; })}/lib -name "*.a" -exec cp {} $out/_pkg \;
-                  find ${pkgs.gmp6.override { withStatic = true; }}/lib -name "*.a" -exec cp {} $out/_pkg \;
-                  # There is no static libc
-                  ${pkgs.tree}/bin/tree $out/_pkg
-                  (cd $out/_pkg; ${pkgs.zip}/bin/zip -r -9 $out/pkg-ios-aarch64-swift-json.zip *)
-                  rm -fR $out/_pkg
-                  mkdir -p $out/nix-support
-                  echo "file binary-dist \"$(echo $out/*.zip)\"" \
-                      > $out/nix-support/hydra-build-products
-                '';
+                postInstall = iosPostInstall "pkg-ios-aarch64-swift-json";
               };
 	            # This is the aarch64-darwin build with tagged JSON format (for Mac & Flutter)
               "aarch64-darwin:lib:simplex-chat" = (drv pkgs).simplex-chat.components.library.override {
@@ -251,24 +252,7 @@
                 # for iOS we also use -staticlib, to get one rolled up library.
                 # still needs mac2ios patching of the archives.
                 ghcOptions = [ "-staticlib" "-threaded" "-DIOS" ];
-                postInstall = ''
-                  ${pkgs.tree}/bin/tree $out
-                  mkdir -p $out/_pkg
-                  # copy over includes, we might want those, but maybe not.
-                  # cp -r $out/lib/*/*/include $out/_pkg/
-                  # find the libHS...ghc-X.Y.Z.a static library; this is the
-                  # rolled up one with all dependencies included.
-                  find ./dist -name "libHS*.a" -exec cp {} $out/_pkg \;
-                  find ${pkgs.libffi.overrideAttrs (old: { dontDisableStatic = true; })}/lib -name "*.a" -exec cp {} $out/_pkg \;
-                  find ${pkgs.gmp6.override { withStatic = true; }}/lib -name "*.a" -exec cp {} $out/_pkg \;
-                  # There is no static libc
-                  ${pkgs.tree}/bin/tree $out/_pkg
-                  (cd $out/_pkg; ${pkgs.zip}/bin/zip -r -9 $out/pkg-ios-aarch64-tagged-json.zip *)
-                  rm -fR $out/_pkg
-                  mkdir -p $out/nix-support
-                  echo "file binary-dist \"$(echo $out/*.zip)\"" \
-                      > $out/nix-support/hydra-build-products
-                '';
+                postInstall = iosPostInstall "pkg-ios-aarch64-tagged-json";
               };
             };
             "x86_64-darwin" = {
@@ -279,24 +263,7 @@
                 # for iOS we also use -staticlib, to get one rolled up library.
                 # still needs mac2ios patching of the archives.
                 ghcOptions = [ "-staticlib" "-threaded" "-DIOS" ];
-                postInstall = ''
-                  ${pkgs.tree}/bin/tree $out
-                  mkdir -p $out/_pkg
-                  # copy over includes, we might want those, but maybe not.
-                  # cp -r $out/lib/*/*/include $out/_pkg/
-                  # find the libHS...ghc-X.Y.Z.a static library; this is the
-                  # rolled up one with all dependencies included.
-                  find ./dist -name "libHS*.a" -exec cp {} $out/_pkg \;
-                  find ${pkgs.libffi.overrideAttrs (old: { dontDisableStatic = true; })}/lib -name "*.a" -exec cp {} $out/_pkg \;
-                  find ${pkgs.gmp6.override { withStatic = true; }}/lib -name "*.a" -exec cp {} $out/_pkg \;
-                  # There is no static libc
-                  ${pkgs.tree}/bin/tree $out/_pkg
-                  (cd $out/_pkg; ${pkgs.zip}/bin/zip -r -9 $out/pkg-ios-x86_64-swift-json.zip *)
-                  rm -fR $out/_pkg
-                  mkdir -p $out/nix-support
-                  echo "file binary-dist \"$(echo $out/*.zip)\"" \
-                      > $out/nix-support/hydra-build-products
-                '';
+                postInstall = iosPostInstall "pkg-ios-x86_64-swift-json";
               };
               # This is the aarch64-darwin build with tagged JSON format (for Mac & Flutter)
               "x86_64-darwin:lib:simplex-chat" = (drv pkgs).simplex-chat.components.library.override {
@@ -305,24 +272,7 @@
                 # for iOS we also use -staticlib, to get one rolled up library.
                 # still needs mac2ios patching of the archives.
                 ghcOptions = [ "-staticlib" "-threaded" "-DIOS" ];
-                postInstall = ''
-                  ${pkgs.tree}/bin/tree $out
-                  mkdir -p $out/_pkg
-                  # copy over includes, we might want those, but maybe not.
-                  # cp -r $out/lib/*/*/include $out/_pkg/
-                  # find the libHS...ghc-X.Y.Z.a static library; this is the
-                  # rolled up one with all dependencies included.
-                  find ./dist -name "libHS*.a" -exec cp {} $out/_pkg \;
-                  find ${pkgs.libffi.overrideAttrs (old: { dontDisableStatic = true; })}/lib -name "*.a" -exec cp {} $out/_pkg \;
-                  find ${pkgs.gmp6.override { withStatic = true; }}/lib -name "*.a" -exec cp {} $out/_pkg \;
-                  # There is no static libc
-                  ${pkgs.tree}/bin/tree $out/_pkg
-                  (cd $out/_pkg; ${pkgs.zip}/bin/zip -r -9 $out/pkg-ios-x86_64-tagged-json.zip *)
-                  rm -fR $out/_pkg
-                  mkdir -p $out/nix-support
-                  echo "file binary-dist \"$(echo $out/*.zip)\"" \
-                      > $out/nix-support/hydra-build-products
-                '';
+                postInstall = iosPostInstall "pkg-ios-x86_64-tagged-json";
               };
             };
         }.${system} or {});