diff --git a/Cargo.lock b/Cargo.lock
index ea870238..d5abbcdf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1239,7 +1239,7 @@ dependencies = [
 [[package]]
 name = "ndc-client"
 version = "0.1.0"
-source = "git+http://github.com/hasura/ndc-spec.git?tag=v0.1.0-rc.8#2c2def8a01af2f95100b4274599030c930525bee"
+source = "git+https://github.com/hasura//ndc-spec.git?rev=3778605#3778605e9428d46e1f21ae02b077414afd0d0a68"
 dependencies = [
  "async-trait",
  "indexmap 1.9.3",
@@ -1319,7 +1319,7 @@ dependencies = [
 [[package]]
 name = "ndc-test"
 version = "0.1.0"
-source = "git+http://github.com/hasura/ndc-spec.git?tag=v0.1.0-rc.8#2c2def8a01af2f95100b4274599030c930525bee"
+source = "git+https://github.com/hasura//ndc-spec.git?rev=3778605#3778605e9428d46e1f21ae02b077414afd0d0a68"
 dependencies = [
  "async-trait",
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index ccac3f07..6c09086f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,12 @@ members = [
   "crates/ndc-sqlserver",
   "crates/query-engine",
 ]
+
+
+# Temporary patch to get the build working. We shall remove this once a new
+# version of ndc-spec is published, and ndc-sdk is updated accordingly.
+# The "//" is to convince Cargo to accept this, due to
+# https://github.com/rust-lang/cargo/issues/10756 .
+[patch."https://github.com/hasura/ndc-spec.git"]
+ndc-client = { git = "https://github.com/hasura//ndc-spec.git", rev = "3778605" }
+ndc-test = { git = "https://github.com/hasura//ndc-spec.git", rev = "3778605" }
diff --git a/flake.nix b/flake.nix
index afa1382f..ee5c1e0f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,8 +8,6 @@
     crane = {
       url = "github:ipetkov/crane";
       inputs.nixpkgs.follows = "nixpkgs";
-      inputs.rust-overlay.follows = "rust-overlay";
-      inputs.flake-utils.follows = "flake-utils";
     };
 
     rust-overlay = {