diff --git a/.github/workflows/ci-nix.yml b/.github/workflows/ci-nix.yml
index f324b4a..1d4e544 100644
--- a/.github/workflows/ci-nix.yml
+++ b/.github/workflows/ci-nix.yml
@@ -29,17 +29,6 @@ jobs:
           - system: x86_64-linux
             runs_on: [self-hosted, Linux, X64]
 
-        # Nimble segfaults on MacOS hosts.
-        exclude:
-          - system: aarch64-darwin
-            nixpkg: libsds-android-arm64
-          - system: aarch64-darwin
-            nixpkg: libsds-android-amd64
-          - system: aarch64-darwin
-            nixpkg: libsds-android-x86
-          - system: aarch64-darwin
-            nixpkg: libsds-android-arm
-
     name: '${{ matrix.system }} / ${{ matrix.nixpkg }}'
     runs-on: ${{ matrix.runs_on }}
     steps:
diff --git a/flake.nix b/flake.nix
index 6eaffdd..b3b3830 100644
--- a/flake.nix
+++ b/flake.nix
@@ -35,6 +35,19 @@
               androidPkgs = final.androidEnvCustom.pkgs;
               androidShell = final.androidEnvCustom.shell;
             })
+
+            (final: prev: {
+              nimble = prev.nimble.overrideAttrs (old: {
+                src = prev.fetchFromGitHub {
+                  version = "0.22.0";
+                  owner = "nim-lang";
+                  repo = "nimble";
+                  rev = "802e158ddce88c93367ebd9b3c66714b215a7928";
+                  hash = "sha256-m0i6JOwdxvp33XAr9XJ1Daly+4DOLPTUDNXKCHJj3I8=";
+                  fetchSubmodules = true;
+                };
+              });
+            })
           ];
         }
       );