diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 8ca6ab0f92..710097b605 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -134,11 +134,15 @@ jobs:
 
             - name: Build Lighthouse for Windows portable
               if:   matrix.arch == 'x86_64-windows-portable'
-              run:  cargo install --path lighthouse --force --locked --features portable,gnosis --profile ${{ matrix.profile }}
+              # FIXME(sproul): profile set to release until this rustc issue is fixed:
+              #
+              # https://github.com/rust-lang/rust/issues/107781
+              run:  cargo install --path lighthouse --force --locked --features portable,gnosis --profile release
 
             - name: Build Lighthouse for Windows modern
               if:   matrix.arch == 'x86_64-windows'
-              run:  cargo install --path lighthouse --force --locked --features modern,gnosis --profile ${{ matrix.profile }}
+              # FIXME(sproul): profile set to release (see above)
+              run:  cargo install --path lighthouse --force --locked --features modern,gnosis --profile release
 
             - name: Configure GPG and create artifacts
               if: startsWith(matrix.arch, 'x86_64-windows') != true