Re: Error in package building : error[E0463]: can't find crate for `openssl_src`

[Hamzeh Nasajpour]

Hello John,

Thanks for your following up.

I put the `openssl` in `inputs` too and the problem wasn't resolved. I also I 
packaged the `openssl-src` and repackage the `openssl-sys` and this is didn't 
resolved the problem too. 

The point is with the following package definitions the `rust-openssl-sys` will 
be build/installed without any error, but in the `etebase-py` 
building/installation I get the previous error.

```
(define-public rust-openssl-src-111.0.1
  (package
    (name "rust-openssl-src")
    (version "111.0.1+1.1.1")
    (source
     (origin
       (method url-fetch)
       (uri (crate-uri "openssl-src" version))
       (file-name
        (string-append name "-" version ".tar.gz"))
       (sha256
        (base32
         "1gpw4zdsi27hg7y4i9xilgfyzp9i56ch5gs64r5ab1gxi3caxvfi"))))
    (build-system cargo-build-system)
    (arguments
     `(#:skip-build? #t
       #:cargo-inputs
       (("rust-gcc" ,rust-gcc-0.3))))
    (home-page "https://github.com/sfackler/rust-openssl";)
    (synopsis "OpenSSL bindings")
    (description "OpenSSL bindings.")
    (license license:asl2.0)))

(define-public rust-openssl-sys-0.9
  (package
    (name "rust-openssl-sys")
    (version "0.9.58")
    (source
      (origin
        (method url-fetch)
        (uri (crate-uri "openssl-sys" version))
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "1pkq3x8w16kqvkg75g4w7nny56w9clssww0ibpzg015n153xnhm8"))))
    (build-system cargo-build-system)
    (arguments
     `(#:cargo-inputs
       (("rust-libc" ,rust-libc-0.2)
        ;; Build dependencies:
        ("rust-autocfg" ,rust-autocfg-1.0)
        ("rust-cc" ,rust-cc-1)
        ("rust-pkg-config" ,rust-pkg-config-0.3)
        ("rust-openssl-src" ,rust-openssl-src-111.0.1)
        ("rust-vcpkg" ,rust-vcpkg-0.2))))
    (native-inputs
     `(("openssl" ,openssl)
       ("pkg-config" ,pkg-config)))
    (home-page "https://github.com/sfackler/rust-openssl";)
    (synopsis "FFI bindings to OpenSSL")
    (description
     "This package provides FFI bindings to OpenSSL for use in rust crates.")
    (license license:expat)))
```


```
phase `patch-cargo-checksums' succeeded after 69.7 seconds
starting phase `build'                                                          
                                                                                
                                                                            
   Compiling autocfg v1.0.1
   Compiling memchr v2.3.3
   Compiling lazy_static v1.4.0
   Compiling regex-syntax v0.6.18
   Compiling libc v0.2.71
   Compiling pkg-config v0.3.17
   Compiling cc v1.0.58
   Compiling bitflags v1.2.1
   Compiling foreign-types-shared v0.1.1
   Compiling openssl v0.10.30
   Compiling cpython v0.3.0
   Compiling cfg-if v0.1.10
   Compiling thread_local v1.0.1
   Compiling foreign-types v0.3.2
   Compiling aho-corasick v0.7.13
   Compiling num-traits v0.2.12
   Compiling regex v1.3.9
   Compiling openssl-sys v0.9.58
error[E0463]: can't find crate for `openssl_src`
 --> 
/tmp/guix-build-python-etebase-py-0.30.0.drv-0/etebase-0.30.0/guix-vendor/rust-openssl-sys-0.9.58.tar.xz/build/main.rs:6:1
  |
6 | extern crate openssl_src;
  | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `openssl-sys`.
warning: build failed, waiting for other jobs to finish...
error: build failed
command "cargo" "build" "--features" "" "--release" failed with status 101

```