diff --git a/Cargo.lock b/Cargo.lock
index a5643b1a9f..296b7851e3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,6 +17,17 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
+[[package]]
+name = "aes"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
+dependencies = [
+ "cfg-if",
+ "cipher",
+ "cpufeatures",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.3"
@@ -109,6 +120,12 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
+
 [[package]]
 name = "arbitrary"
 version = "1.3.2"
@@ -191,6 +208,17 @@ version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8c3c1a368f70d6cf7302d78f8f7093da241fb8e8807c05cc9e51a125895a6d5b"
 
+[[package]]
+name = "binstall-tar"
+version = "0.4.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3620d72763b5d8df3384f3b2ec47dc5885441c2abbd94dd32197167d08b014a"
+dependencies = [
+ "filetime",
+ "libc",
+ "xattr",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -257,6 +285,27 @@ version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "514de17de45fdb8dc022b1a7975556c53c86f9f0aa5f534b98977b171857c2c9"
 
+[[package]]
+name = "bzip2"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdb116a6ef3f6c3698828873ad02c3014b3c85cadb88496095628e3ef1e347f8"
+dependencies = [
+ "bzip2-sys",
+ "libc",
+]
+
+[[package]]
+name = "bzip2-sys"
+version = "0.1.11+1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "736a955f3fa7875102d57c82b8cac37ec45224a07fd32d58f9f7a186b6cd4cdc"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+]
+
 [[package]]
 name = "calm_io"
 version = "0.1.1"
@@ -337,6 +386,16 @@ dependencies = [
  "envmnt",
 ]
 
+[[package]]
+name = "cipher"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
+dependencies = [
+ "crypto-common",
+ "inout",
+]
+
 [[package]]
 name = "clap"
 version = "4.5.7"
@@ -357,6 +416,7 @@ dependencies = [
  "anstyle",
  "clap_lex",
  "strsim",
+ "terminal_size",
 ]
 
 [[package]]
@@ -441,6 +501,17 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b6a852b24ab71dffc585bcb46eaf7959d175cb865a7152e35b348d1b2960422"
 
+[[package]]
+name = "colored"
+version = "1.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a5f741c91823341bebf717d4c71bda820630ce065443b58bd1b7451af008355"
+dependencies = [
+ "is-terminal",
+ "lazy_static",
+ "winapi",
+]
+
 [[package]]
 name = "confique"
 version = "0.2.5"
@@ -482,6 +553,12 @@ version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
 
+[[package]]
+name = "constant_time_eq"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7144d30dcf0fafbce74250a3963025d8d52177934239851c917d29f1df280c2"
+
 [[package]]
 name = "contracts"
 version = "0.6.3"
@@ -518,6 +595,21 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crc"
+version = "3.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69e6e4d7b33a94f0991c26729976b10ebde1d34c3ee82408fb536164fa10d636"
+dependencies = [
+ "crc-catalog",
+]
+
+[[package]]
+name = "crc-catalog"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19d374276b40fb8bbdee95aef7c7fa6b5316ec764510eb64b8dd0e2ed0d7e7f5"
+
 [[package]]
 name = "crc32fast"
 version = "1.4.2"
@@ -600,6 +692,12 @@ dependencies = [
  "syn 2.0.66",
 ]
 
+[[package]]
+name = "deflate64"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83ace6c86376be0b6cdcf3fb41882e81d94b31587573d1cfa9d01cd06bba210d"
+
 [[package]]
 name = "demand"
 version = "1.2.4"
@@ -667,6 +765,7 @@ checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
  "block-buffer",
  "crypto-common",
+ "subtle",
 ]
 
 [[package]]
@@ -853,6 +952,16 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9fc0510504f03c51ada170672ac806f1f105a88aa97a5281117e1ddc3368e51a"
 
+[[package]]
+name = "fern"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9f0c14694cbd524c8720dd69b0e3179344f04ebb5f90f2e4a440c6ea3b2f1ee"
+dependencies = [
+ "colored",
+ "log",
+]
+
 [[package]]
 name = "fiat-crypto"
 version = "0.2.9"
@@ -1139,6 +1248,15 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
+[[package]]
+name = "hmac"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
+dependencies = [
+ "digest",
+]
+
 [[package]]
 name = "home"
 version = "0.5.9"
@@ -1505,6 +1623,15 @@ version = "2.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b248f5224d1d606005e02c97f5aa4e88eeb230488bcc03bc9ca4d7991399f2b5"
 
+[[package]]
+name = "inout"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0c10553d664a4d0bcff9f4215d0aac67a639cc68ef660840afe309b807bc9f5"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "insta"
 version = "1.39.0"
@@ -1534,6 +1661,17 @@ version = "2.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f518f335dce6725a761382244631d86cf0ccb2863413590b31338feb467f9c3"
 
+[[package]]
+name = "is-terminal"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f23ff5ef2b80d608d61efee834934d862cd92461afc0560dedf493e4c033738b"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.0"
@@ -1593,6 +1731,29 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "lazy-regex"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d12be4595afdf58bd19e4a9f4e24187da2a66700786ff660a418e9059937a4c"
+dependencies = [
+ "lazy-regex-proc_macros",
+ "once_cell",
+ "regex",
+]
+
+[[package]]
+name = "lazy-regex-proc_macros"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44bcd58e6c97a7fcbaffcdc95728b393b8d98933bfadad49ed4097845b57ef0b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "regex",
+ "syn 2.0.66",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -1681,6 +1842,27 @@ version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
+[[package]]
+name = "lzma-rs"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "297e814c836ae64db86b36cf2a557ba54368d03f6afcd7d947c266692f71115e"
+dependencies = [
+ "byteorder",
+ "crc",
+]
+
+[[package]]
+name = "lzma-sys"
+version = "0.1.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fda04ab3764e6cde78b9974eec4f779acaba7c4e84b36eca3cf77c581b85d27"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+]
+
 [[package]]
 name = "matchers"
 version = "0.1.0"
@@ -1834,6 +2016,7 @@ dependencies = [
  "tokio",
  "toml",
  "toml_edit",
+ "ubi",
  "url",
  "usage-lib",
  "versions",
@@ -2066,6 +2249,16 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "pbkdf2"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ed6a7761f76e3b9f92dfb0a60a6a6477c61024b775147ff0973a02653abaf2"
+dependencies = [
+ "digest",
+ "hmac",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.1"
@@ -2215,9 +2408,9 @@ checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
 [[package]]
 name = "platforms"
-version = "3.4.0"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db23d408679286588f4d4644f965003d056e3dd5abcaaa938116871d7ce2fee7"
+checksum = "14e6ab3f592e6fb464fc9712d8d6e6912de6473954635fd76a589d832cffcbb0"
 
 [[package]]
 name = "portable-atomic"
@@ -2479,6 +2672,12 @@ dependencies = [
  "winreg",
 ]
 
+[[package]]
+name = "result"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "194d8e591e405d1eecf28819740abed6d719d1a2db87fc0bcdedee9a26d55560"
+
 [[package]]
 name = "ring"
 version = "0.17.8"
@@ -2749,6 +2948,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sha1"
+version = "0.10.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "sha2"
 version = "0.10.8"
@@ -3226,9 +3436,21 @@ dependencies = [
  "num_cpus",
  "pin-project-lite",
  "socket2",
+ "tokio-macros",
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "tokio-macros"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f5ae998a069d4b5aba8ee9dad856af7d520c3699e6159b185c2acd48155d39a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.66",
+]
+
 [[package]]
 name = "tokio-native-tls"
 version = "0.3.1"
@@ -3394,6 +3616,35 @@ version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
 
+[[package]]
+name = "ubi"
+version = "0.1.0"
+source = "git+https://github.com/houseabsolute/ubi.git?branch=library-ize#f607e3c6cab0b15fc4e73116b7058244ab5c282c"
+dependencies = [
+ "anyhow",
+ "binstall-tar",
+ "bzip2",
+ "clap",
+ "fern",
+ "flate2",
+ "itertools 0.12.1",
+ "lazy-regex",
+ "log",
+ "platforms",
+ "regex",
+ "reqwest",
+ "result",
+ "serde",
+ "strum",
+ "tempfile",
+ "test-case",
+ "thiserror",
+ "tokio",
+ "url",
+ "xz",
+ "zip",
+]
+
 [[package]]
 name = "ucd-trie"
 version = "0.1.6"
@@ -3483,6 +3734,7 @@ dependencies = [
  "form_urlencoded",
  "idna",
  "percent-encoding",
+ "serde",
 ]
 
 [[package]]
@@ -4008,6 +4260,24 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "xz"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c887690ff2a2e233e8e49633461521f98ec57fbff9d59a884c9a4f04ec1da34"
+dependencies = [
+ "xz2",
+]
+
+[[package]]
+name = "xz2"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388c44dc09d76f1536602ead6d325eb532f5c122f17782bd57fb47baeeb767e2"
+dependencies = [
+ "lzma-sys",
+]
+
 [[package]]
 name = "yansi"
 version = "0.5.1"
@@ -4064,6 +4334,20 @@ name = "zeroize"
 version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.66",
+]
 
 [[package]]
 name = "zerovec"
@@ -4093,15 +4377,26 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "775a2b471036342aa69bc5a602bc889cb0a06cda00477d0c69566757d5553d39"
 dependencies = [
+ "aes",
  "arbitrary",
+ "bzip2",
+ "constant_time_eq",
  "crc32fast",
  "crossbeam-utils",
+ "deflate64",
  "displaydoc",
  "flate2",
+ "hmac",
  "indexmap 2.2.6",
+ "lzma-rs",
  "memchr",
+ "pbkdf2",
+ "rand",
+ "sha1",
  "thiserror",
+ "zeroize",
  "zopfli",
+ "zstd",
 ]
 
 [[package]]
@@ -4128,3 +4423,31 @@ dependencies = [
  "once_cell",
  "simd-adler32",
 ]
+
+[[package]]
+name = "zstd"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d789b1514203a1120ad2429eae43a7bd32b90976a7bb8a05f7ec02fa88cc23a"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "7.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1cd99b45c6bc03a018c8b8a86025678c87e55526064e38f9df301989dce7ec0a"
+dependencies = [
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.10+zstd.1.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c253a4914af5bafc8fa8c86ee400827e83cf6ec01195ec1f1ed8441bf00d65aa"
+dependencies = [
+ "cc",
+ "pkg-config",
+]
diff --git a/Cargo.toml b/Cargo.toml
index a08fc0745c..0fa5b22d74 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -123,6 +123,8 @@ which = "6.0.1"
 xx = { version = "1.0.0", features = ["glob"] }
 zip = { version = "2", default-features = false, features = ["deflate"] }
 
+ubi = { git = "https://github.com/houseabsolute/ubi.git", branch = "library-ize" }
+
 [target.'cfg(unix)'.dependencies]
 exec = "0.3.1"
 
diff --git a/src/backend/ubi.rs b/src/backend/ubi.rs
index 7a3430ab15..0761869203 100644
--- a/src/backend/ubi.rs
+++ b/src/backend/ubi.rs
@@ -1,10 +1,11 @@
 use std::fmt::Debug;
 
+use eyre::eyre;
+
 use crate::backend::{Backend, BackendType};
 use crate::cache::CacheManager;
 use crate::cli::args::BackendArg;
-use crate::cmd::CmdLineRunner;
-use crate::config::{Config, Settings};
+use crate::config::Settings;
 use crate::env::GITHUB_TOKEN;
 use crate::github;
 use crate::install_context::InstallContext;
@@ -28,10 +29,9 @@ impl Backend for UbiBackend {
     }
 
     fn get_dependencies(&self, _tvr: &ToolRequest) -> eyre::Result<Vec<BackendArg>> {
-        Ok(vec!["cargo:ubi".into()])
+        Ok(vec![])
     }
 
-    // TODO: v0.0.3 is stripped of 'v' such that it reports incorrectly in tool :-/
     fn _list_remote_versions(&self) -> eyre::Result<Vec<String>> {
         if name_is_url(self.name()) {
             Ok(vec!["latest".to_string()])
@@ -49,31 +49,31 @@ impl Backend for UbiBackend {
     }
 
     fn install_version_impl(&self, ctx: &InstallContext) -> eyre::Result<()> {
-        let config = Config::try_get()?;
         let settings = Settings::get();
         let version = &ctx.tv.version;
         settings.ensure_experimental("ubi backend")?;
         // Workaround because of not knowing how to pull out the value correctly without quoting
         let path_with_bin = ctx.tv.install_path().join("bin");
 
-        let mut cmd = CmdLineRunner::new("ubi")
-            .arg("--in")
-            .arg(path_with_bin)
-            .arg("--project")
-            .arg(self.name())
-            .with_pr(ctx.pr.as_ref())
-            .envs(ctx.ts.env_with_path(&config)?)
-            .prepend_path(ctx.ts.list_paths())?;
+        let mut builder = ubi::UbiBuilder::new()
+            .project(self.name())
+            .install_dir(path_with_bin);
 
         if let Some(token) = &*GITHUB_TOKEN {
-            cmd = cmd.env("GITHUB_TOKEN", token);
+            builder = builder.github_token(token);
         }
 
         if version != "latest" {
-            cmd = cmd.arg("--tag").arg(version);
+            builder = builder.tag(version);
         }
 
-        cmd.execute()
+        let u = builder.build().map_err(|e| eyre!(Box::new(e)))?;
+
+        let rt = tokio::runtime::Builder::new_current_thread()
+            .enable_io()
+            .build()?;
+        rt.block_on(u.install_binary())
+            .map_err(|e| eyre!(Box::new(e)))
     }
 }