error[E0412]: cannot find type `BigInt` in this scope

[garro95]

If I clone, remove Cargo.lock to work around issue #24 and cargo build --release I get the error in title. Also without "--release" same error.
Full error is:

   Compiling num-rational v0.1.37
error[E0412]: cannot find type `BigInt` in this scope
   --> /home/gianmarco/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.1.37/src/lib.rs:671:30
    |
671 | impl FromPrimitive for Ratio<BigInt> {
    |                              ^^^^^^ not found in this scope

error: no associated item named `from_float` found for type `Ratio<_>` in the current scope
   --> /home/gianmarco/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.1.37/src/lib.rs:681:9
    |
681 |         Ratio::from_float(n)
    |         ^^^^^^^^^^^^^^^^^

error: no associated item named `from_float` found for type `Ratio<_>` in the current scope
   --> /home/gianmarco/.cargo/registry/src/github.com-1ecc6299db9ec823/num-rational-0.1.37/src/lib.rs:685:9
    |
685 |         Ratio::from_float(n)
    |         ^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

error: Could not compile `num-rational`.

Also, in the installation instruction, I would suggest you to compile with --release.