maybe

.tangled/workflows/release.yml

···
       - cargo
 
 steps:
-  - name: "Log in to crates.io."
+  - name: "Log in to crates.io"
     command: cargo login $ATFETCH_API_KEY
   - name: "Build for release"
-    command: cargo build --release
+    command: |
+      export PATH="$HOME/.nix-profile/bin:$PATH"
+
+      nix-channel --add https://nixos.org/channels/nixpkgs-unstable nixpkgs
+
+      nix-channel --update
+
+      nix-shell -p pkg-config openssl --run '
+        export PKG_CONFIG_PATH="$(pkg-config --variable pc_path pkg-config)"
+        export OPENSSL_DIR="$(nix-build --no-out-link "<nixpkgs>" -A openssl.dev)"
+        export OPENSSL_NO_VENDOR=1
+        export OPENSSL_LIB_DIR="$(nix-build --no-out-link "<nixpkgs>" -A openssl.out)/lib"
+        cargo build --release
+      '
   - name: "Package for crates.io"
-    command: cargo Package
+    command: cargo package
   - name: "Publish"
     command: cargo publish