diff --git a/Cargo.lock b/Cargo.lock
index 8584cce..c9f58a9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,18 +1,9 @@
-[[package]]
-name = "advapi32-sys"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "aho-corasick"
-version = "0.6.3"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -25,114 +16,73 @@ dependencies = [
 
 [[package]]
 name = "atty"
-version = "0.2.3"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace"
-version = "0.3.3"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace-sys 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "dbghelp-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys 0.1.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-demangle 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace-sys"
-version = "0.1.16"
+version = "0.1.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "bitflags"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
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-version = "0.8.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
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 version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "cargo"
-version = "0.21.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
+name = "cargo-ebuild"
+version = "0.1.6-pre"
 dependencies = [
- "advapi32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "atty 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "crates-io 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "curl 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "docopt 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "fs2 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "git2 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "git2-curl 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "hex 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jobserver 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "libgit2-sys 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
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- "scoped-tls 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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- "serde_json 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
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- "toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cargo_metadata 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "toml 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "cargo-ebuild"
-version = "0.1.6-pre"
+name = "cargo_metadata"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cargo 0.21.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "cc"
-version = "1.0.3"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cfg-if"
-version = "0.1.0"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -141,7 +91,7 @@ version = "2.32.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "atty 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -149,90 +99,21 @@ dependencies = [
  "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "cmake"
-version = "0.1.22"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "gcc 0.3.45 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crates-io"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "curl 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
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-version = "0.2.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "curl-sys 0.3.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-probe 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "curl-sys"
-version = "0.3.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "gcc 0.3.45 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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-]
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-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "docopt"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "dtoa"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "env_logger"
-version = "0.4.3"
+version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "humantime 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termcolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -240,282 +121,79 @@ name = "error-chain"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
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-]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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- "miniz-sys 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
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-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-version = "0.4.2"
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-dependencies = [
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
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-version = "0.3.45"
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-
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- "openssl-probe 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "git2-curl"
-version = "0.7.0"
+name = "failure"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "curl 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "git2 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure_derive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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-
-[[package]]
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-
-[[package]]
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 dependencies = [
- "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
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- "unicode-normalization 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-
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- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
-name = "kernel32-sys"
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+name = "itoa"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
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-]
 
 [[package]]
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-version = "0.2.8"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.21"
+version = "0.2.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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- "libssh2-sys 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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-dependencies = [
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- "libz-sys 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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- "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
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-
-[[package]]
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-
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- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-[[package]]
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- "user32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
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-[[package]]
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-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
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 [[package]]
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+name = "quick-error"
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- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
 name = "quote"
@@ -524,23 +202,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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-version = "0.1.17"
+version = "0.1.40"
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 [[package]]
@@ -548,43 +218,41 @@ name = "redox_termios"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "redox_syscall 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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+version = "1.0.2"
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- "thread_local 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aho-corasick 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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-version = "0.4.1"
+version = "0.6.2"
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+dependencies = [
+ "ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
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-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
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+version = "0.1.9"
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- "serde 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
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@@ -594,57 +262,29 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
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+version = "1.0.70"
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-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "serde 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.14.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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+version = "1.0.24"
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- "num-traits 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "dtoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
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-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
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-
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@@ -664,9 +304,9 @@ name = "structopt-derive"
 version = "0.2.10"
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- "proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.14.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -681,11 +321,11 @@ dependencies = [
 
 [[package]]
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-version = "0.14.2"
+version = "0.14.5"
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- "proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
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 ]
 
@@ -698,28 +338,20 @@ dependencies = [
 ]
 
 [[package]]
-name = "tar"
-version = "0.4.11"
+name = "synstructure"
+version = "0.6.1"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "wincolor 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wincolor 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -727,8 +359,8 @@ name = "termion"
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 dependencies = [
- "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
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 ]
 
@@ -742,43 +374,34 @@ dependencies = [
 
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
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- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
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-
-[[package]]
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 dependencies = [
- "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "unicode-normalization"
-version = "0.1.4"
+name = "ucd-util"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -804,24 +427,6 @@ dependencies = [
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-[[package]]
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 [[package]]
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@@ -837,11 +442,6 @@ name = "void"
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-
 [[package]]
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@@ -851,11 +451,6 @@ dependencies = [
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-[[package]]
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-
 [[package]]
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@@ -868,126 +463,70 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
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+ "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
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 "checksum unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 "checksum unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "382810877fe448991dfc7f0dd6e3ae5d58088fd0ea5e35189655f84e6814fa56"
-"checksum url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f5ba8a749fb4479b043733416c244fa9d1d3af3d7c23804944651c8a448cb87e"
-"checksum user32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4ef4711d107b21b410a3a974b1204d9accc8b10dad75d8324b5d755de1617d47"
 "checksum utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "662fab6525a98beff2921d7f61a39e7d59e0b425ebc7d0d9e66d316e55124122"
 "checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
 "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
-"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "773ef9dcc5f24b7d850d0ff101e542ff24c3b090a9768e03ff889fdef41f00fd"
-"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-"checksum wincolor 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "a39ee4464208f6430992ff20154216ab2357772ac871d994c51628d60e58b8b0"
-"checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+"checksum wincolor 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b9dc3aa9dcda98b5a16150c54619c1ead22e3d3a5d458778ae914be760aa981a"
diff --git a/Cargo.toml b/Cargo.toml
index 7cb54bc..d83b857 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,6 +26,10 @@ travis-ci = { repository = "cardoe/cargo-ebuild" }
 maintenance = { status = "passively-maintained" }
 
 [dependencies]
-cargo = "^0.21"
 structopt = "^0.2"
 time = "^0.1"
+cargo_metadata = "0.5.4"
+toml = "^0.4"
+failure = "^0.1"
+log = "^0.4"
+env_logger = "^0.5"
diff --git a/src/ebuild.template b/src/ebuild.template
index 2ac9447..8565948 100644
--- a/src/ebuild.template
+++ b/src/ebuild.template
@@ -8,6 +8,8 @@ EAPI=6
 CRATES="
 {crates}"
 
+CARGO_FEATURES="{features}"
+
 inherit cargo
 
 DESCRIPTION="{description}"
diff --git a/src/lib.rs b/src/lib.rs
index 41f9bcc..9388f19 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,141 +6,169 @@
  * <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
  * option. This file may not be copied, modified, or distributed
  * except according to those terms.
- */
+*/
 
-extern crate cargo;
+extern crate cargo_metadata;
 extern crate time;
-
-use cargo::core::registry::PackageRegistry;
-use cargo::core::resolver::Method;
-use cargo::core::{Package, PackageSet, Resolve, Workspace};
-use cargo::ops;
-use cargo::util::{important_paths, CargoResult, CargoResultExt};
-use cargo::{CliResult, Config};
+extern crate toml;
+#[macro_use]
+extern crate failure;
+#[macro_use]
+extern crate log;
+
+pub use failure::Error; // re-exported to main
+use std::env;
+use std::fs::File;
 use std::fs::OpenOptions;
+use std::io::prelude::*;
 use std::io::Write;
+use std::path::Path;
 use std::path::PathBuf;
+use toml::Value;
 
-/// Finds the root Cargo.toml of the workspace
-fn workspace(config: &Config, manifest_path: Option<String>) -> CargoResult<Workspace> {
-    let root = important_paths::find_root_manifest_for_wd(manifest_path, config.cwd())?;
-    Workspace::new(&root, config)
-}
-
-/// Generates a package registry by using the Cargo.lock or creating one as necessary
-fn registry<'a>(config: &'a Config, package: &Package) -> CargoResult<PackageRegistry<'a>> {
-    let mut registry = PackageRegistry::new(config)?;
-    registry.add_sources(&[package.package_id().source_id().clone()])?;
-    Ok(registry)
-}
-
-/// Resolve the packages necessary for the workspace
-fn resolve<'a>(
-    registry: &mut PackageRegistry,
-    workspace: &'a Workspace,
-) -> CargoResult<(PackageSet<'a>, Resolve)> {
-    // resolve our dependencies
-    let (packages, resolve) = ops::resolve_ws(workspace)?;
-
-    // resolve with all features set so we ensure we get all of the depends downloaded
-    let resolve = ops::resolve_with_previous(
-        registry,
-        workspace,
-        /* resolve it all */
-        Method::Everything,
-        /* previous */
-        Some(&resolve),
-        /* don't avoid any */
-        None,
-        /* specs */
-        &[],
-    )?;
+pub fn ebuild(ebuild_path: Option<String>, manifest_path: Option<String>) -> Result<(), Error> {
+    let manifest = manifest_path.map_or_else(
+        || env::current_dir().unwrap().join("Cargo.toml"),
+        |path| Path::new(&path).to_path_buf(),
+    );
 
-    Ok((packages, resolve))
-}
+    if !manifest.is_file() {
+        return Err(format_err!(
+            "Cargo manifest not found at: {}",
+            manifest.display()
+        ));
+    }
 
-pub fn run(verbose: u32, quiet: bool) -> CliResult {
-    // create a default Cargo config
-    let config = Config::default()?;
-
-    config.configure(
-        verbose,
-        Some(quiet),
-        /* color */
-        &None,
-        /* frozen */
-        false,
-        /* locked */
-        false,
-    )?;
+    let metadata = cargo_metadata::metadata_deps(Some(&manifest), true)
+        .map_err(|err| format_err!("Error while access cargo metadata: {}", err))?;
 
-    // Load the workspace and current package
-    let workspace = workspace(&config, None)?;
-    let package = workspace.current()?;
+    let resolve = metadata
+        .resolve
+        .ok_or_else(|| format_err!("No project dependences"))?
+        .nodes;
 
-    // Resolve all dependencies (generate or use Cargo.lock as necessary)
-    let mut registry = registry(&config, &package)?;
-    let resolve = resolve(&mut registry, &workspace)?;
+    let mut git_crates = Vec::new();
 
     // build the crates the package needs
     let mut crates = resolve
-        .1
         .iter()
-        .map(|pkg| format!("{}-{}\n", pkg.name(), pkg.version()))
+        .cloned()
+        .filter_map(|pkg| {
+            let infopkg: Vec<&str> = pkg.id.split(' ').collect();
+            if infopkg.len() != 3 {
+                None
+            } else if infopkg[2].starts_with("(git") {
+                git_crates.push(infopkg[2][1..infopkg[2].len()].to_string());
+                None
+            } else {
+                Some(format!("{}-{}", infopkg[0], infopkg[1]))
+            }
+        })
         .collect::<Vec<String>>();
 
     // sort the crates
     crates.sort();
 
-    // root package metadata
-    let metadata = package.manifest().metadata();
-
-    // package description
-    let desc = metadata
-        .description
-        .as_ref()
-        .cloned()
-        .unwrap_or_else(|| String::from(package.name()));
-
-    // package homepage
-    let homepage = metadata.homepage.as_ref().cloned().unwrap_or(
-        metadata
-            .repository
-            .as_ref()
-            .cloned()
-            .unwrap_or_else(|| String::from("")),
-    );
-
-    let license = metadata
-        .license
-        .as_ref()
-        .cloned()
-        .unwrap_or_else(|| String::from("unknown license"));
+    let mut string = String::new();
+    File::open(&manifest)?.read_to_string(&mut string)?;
+
+    let parsed_manifest = string.parse::<Value>()?;
+    let table = &parsed_manifest
+        .as_table()
+        .ok_or_else(|| format_err!("Cargo manifest does not contain a toml table"))?;
+    let package = table
+        .get("package")
+        .ok_or_else(|| format_err!("Field \"package\" is missing in Cargo manifest"))?;
+    let name = read_from_manifest(package, &"name").unwrap_or_else(|| {
+        warn!("Not found package's name field in Cargo.toml. Manual setup needed");
+        String::from("")
+    });
+
+    let mut license = read_from_manifest(package, &"license").unwrap_or_else(|| {
+        warn!("Not found package's license field in Cargo.toml. Look for license-file.");
+
+        read_from_manifest(package, &"license-file").unwrap_or_else(|| {
+            warn!("Not found package's license-file field in Cargo.toml. Manual setup needed");
+            String::from("")
+        })
+    });
+
+    // convert cargo format to portage
+    if license.contains('/') {
+        license = license.as_str().split('/').map(|f| f.trim()).collect::<Vec<&str>>().join(" | ");
+    } else if license.contains("AND") || license.contains("OR") {
+        license = license.replace("AND", "&&");
+        license = license.replace("OR", "||");
+    }
+
+    let description = read_from_manifest(package, &"description").unwrap_or_else(|| {
+        warn!("Not found package's description field in Cargo.toml. Used package's name");
+        name.clone()
+    });
+    let repository = read_from_manifest(package, &"repository").unwrap_or_else(|| {
+        warn!("Not found package's repository field in Cargo.toml. Manual setup needed");
+        String::from("")
+    });
+    let homepage = read_from_manifest(package, &"homepage").unwrap_or_else(|| {
+        warn!("Not found package's name field in Cargo.toml. Manual setup needed");
+        repository
+    });
+    let version = read_from_manifest(package, &"version").unwrap_or_else(|| {
+        warn!("Not found package's version field in Cargo.toml. Manual setup needed");
+        String::from("")
+    });
+
+    // look for features
+    let features = match metadata.packages.iter().filter(|pkg| {
+        name == pkg.name
+    }).collect::<Vec<&cargo_metadata::Package>>().pop() {
+        Some(target) => target.features.keys().map(|key| key.to_string()).collect(),
+        None => Vec::new(),
+    };
+
+    debug!("For {} found features {:?}", name, features);
 
     // build up the ebuild path
-    let ebuild_path = PathBuf::from(format!("{}-{}.ebuild", package.name(), package.version()));
+    let path = match ebuild_path {
+        Some(path_arg) => PathBuf::from(path_arg),
+        None => std::env::current_dir().unwrap(),
+    };
+
+    let ebuild_path = if path.is_dir() {
+        if !path.exists() {
+            return Err(format_err!("No such file or directory"));
+        }
+        let ebuild_name = PathBuf::from(format!("{}-{}.ebuild", name, version));
+        path.join(ebuild_name)
+    } else {
+        path
+    };
 
     // Open the file where we'll write the ebuild
     let mut file = OpenOptions::new()
         .write(true)
         .create(true)
         .truncate(true)
-        .open(&ebuild_path)
-        .chain_err(|| "failed to create ebuild")?;
+        .open(&ebuild_path)?;
 
     // write the contents out
-    write!(
+    writeln!(
         file,
         include_str!("ebuild.template"),
-        description = desc.trim(),
+        description = description.trim(),
         homepage = homepage.trim(),
         license = license.trim(),
-        crates = crates.join(""),
-        cargo_ebuild_ver = env!("CARGO_PKG_VERSION"),
-        this_year = 1900 + time::now().tm_year,
-    ).chain_err(|| "unable to write ebuild to disk")?;
+        crates = crates.join("\n"),
+        features = features.join(" "),
+        cargo_ebuild_ver = &env!("CARGO_PKG_VERSION"),
+        this_year = 1900 + time::now().tm_year
+    )?;
 
     println!("Wrote: {}", ebuild_path.display());
 
     Ok(())
 }
+
+fn read_from_manifest(package: &Value, query: &str) -> Option<String> {
+    package.get(query)?.clone().try_into::<String>().ok()
+}
diff --git a/src/main.rs b/src/main.rs
index ee8f7c2..9d61958 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,58 +8,84 @@
  * except according to those terms.
  */
 
-extern crate cargo;
 extern crate cargo_ebuild;
 #[macro_use]
 extern crate structopt;
+extern crate env_logger;
+extern crate log;
 
-use cargo::util::CliError;
-use cargo_ebuild::run;
+use cargo_ebuild::*;
+use log::Level as LogLevel;
 use std::process;
 use structopt::clap::AppSettings;
 use structopt::StructOpt;
 
 #[derive(StructOpt, Debug)]
-struct Args {
+#[structopt(name = "cargo", raw(setting = "AppSettings::ColoredHelp"))]
+struct Opt {
     /// Silence all output
     #[structopt(short = "q", long = "quiet")]
     quiet: bool,
     /// Verbose mode (-v, -vv, -vvv, etc.)
     #[structopt(short = "v", long = "verbose", parse(from_occurrences))]
     verbose: usize,
+    /// Generates an ebuild for a given Cargo project
+    #[structopt(subcommand)]
+    cmd: Option<Command>,
 }
 
-#[derive(StructOpt, Debug)]
-#[structopt(bin_name = "cargo")]
-enum Opt {
-    #[structopt(
-        name = "ebuild",
-        raw(
-            setting = "AppSettings::UnifiedHelpMessage",
-            setting = "AppSettings::DeriveDisplayOrder",
-            setting = "AppSettings::DontCollapseArgsInUsage"
-        )
-    )]
-    /// Generates an ebuild for a given Cargo project
-    Ebuild(Args),
+#[derive(Debug, StructOpt)]
+pub enum Command {
+    #[structopt(name = "ebuild")]
+    /// Build an ebuild file from a cargo project
+    Ebuild {
+        #[structopt(long = "ebuild-path", short = "o")]
+        ebuild_path: Option<String>,
+        #[structopt(long = "manifest-path", short = "m")]
+        manifest_path: Option<String>,
+    },
 }
 
-fn main() {
-    let Opt::Ebuild(opt) = Opt::from_args();
+/// Parse cli commands
+pub fn run(cmd: Option<Command>) -> Result<(), Error> {
+    // If no command is specified run build with default conf
+    let cmd = cmd.unwrap_or(Command::Ebuild {
+        ebuild_path: None,
+        manifest_path: None,
+    });
+
+    // Here will be the match of the commands, now just example
+    match cmd {
+        Command::Ebuild {
+            ebuild_path,
+            manifest_path,
+        } => ebuild(ebuild_path, manifest_path),
+    }
+}
+
+fn main() -> Result<(), Error> {
+    let opt = Opt::from_args();
+
+    env_logger::Builder::new()
+        .filter(
+            None,
+            match opt.verbose {
+                0 => LogLevel::Error,
+                1 => LogLevel::Warn,
+                2 => LogLevel::Info,
+                3 => LogLevel::Debug,
+                _ => LogLevel::Trace,
+            }.to_level_filter(),
+        )
+        .try_init()?;
 
     // run the actual code
-    if let Err(e) = run(opt.verbose as u32, opt.quiet) {
-        // break apart the error
-        let CliError {
-            error,
-            exit_code,
-            unknown: _unknown,
-        } = e;
+    if let Err(error) = run(opt.cmd) {
         // display a msg if we got one
-        if let Some(msg) = error {
-            eprintln!("{}", msg);
-        }
+        println!("{:?}", error);
         // exit appropriately
-        process::exit(exit_code);
+        process::exit(1);
     }
+
+    Ok(())
 }