diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f35cdd7f..27ed2da9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,7 +39,7 @@ jobs:
       - uses: roc-lang/setup-roc@cbe782d6f165b89c87d99f50a59ac4f5f73b4427 # ratchet:roc-lang/setup-roc@v0.3.0
         with:
           version: nightly-new-compiler
-          nightly-tag: nightly-2026-08-23-fb208ba
+          nightly-tag: nightly-2026-08-30-34e7489
       - name: Install Rust toolchain
         run: |
           rustup toolchain install "${{ needs.rust-version.outputs.version }}" --profile minimal --target x86_64-unknown-linux-musl --component llvm-tools-preview
@@ -58,7 +58,7 @@ jobs:
       - uses: roc-lang/setup-roc@cbe782d6f165b89c87d99f50a59ac4f5f73b4427 # ratchet:roc-lang/setup-roc@v0.3.0
         with:
           version: nightly-new-compiler
-          nightly-tag: nightly-2026-08-23-fb208ba
+          nightly-tag: nightly-2026-08-30-34e7489
       - name: Install Rust toolchain
         shell: bash
         run: |
@@ -103,7 +103,7 @@ jobs:
       - uses: roc-lang/setup-roc@cbe782d6f165b89c87d99f50a59ac4f5f73b4427 # ratchet:roc-lang/setup-roc@v0.3.0
         with:
           version: nightly-new-compiler
-          nightly-tag: nightly-2026-08-23-fb208ba
+          nightly-tag: nightly-2026-08-30-34e7489
       - name: Install Rust toolchain
         shell: bash
         run: |
diff --git a/platform/Sqlite.roc b/platform/Sqlite.roc
index 4488986d..064edf8d 100644
--- a/platform/Sqlite.roc
+++ b/platform/Sqlite.roc
@@ -395,7 +395,7 @@ decode_rows! = |stmt, gen_decode| {
 }
 
 lookup_value! = |cols, stmt, name|
-	match cols.find_first_index(|x| x == name) {
+	match List.find_first_index(cols, |x| x == name) {
 		Ok(index) => sqlite_column_value!(stmt, index)
 		Err(NotFound) => Err(NoSuchField(name))
 	}
@@ -499,3 +499,20 @@ code_from_i64 = |code|
 		101 => Done
 		other => Unknown(other)
 	}
+
+## A row decoder written the way an application writes one.
+## The compiler has to settle its type right here, before `query_many!`
+## ever gets to say what `cols` is. Each call infers the type of `cols` separately,
+## and since roc-lang/roc#10984 these types are no longer resolved together.
+##
+## The test is successful if this snippet compiles.
+expect {
+	_decode_row = |cols|
+		|stmt| {
+			id = Sqlite.i64("id")(cols)(stmt)?
+			task = Sqlite.str("task")(cols)(stmt)?
+			status = Sqlite.str("status")(cols)(stmt)?
+			Ok({ id, task, status })
+		}
+	Bool.True
+}