diff --git a/.cirrus.yml b/.cirrus.yml
new file mode 100644
index 00000000000..e173df423a7
--- /dev/null
+++ b/.cirrus.yml
@@ -0,0 +1,25 @@
+task:
+  name: freebsd
+  freebsd_instance:
+    image: freebsd-12-1-release-amd64
+  setup_rust_script:
+    - pkg install -y curl git bash
+    - curl https://sh.rustup.rs -sSf --output rustup.sh
+    - sh rustup.sh --default-toolchain none -y --profile=minimal
+  cargo_bin_cache:
+    folder: ~/.cargo/bin
+  target_cache:
+    folder: target
+  prepare_script:
+    - . $HOME/.cargo/env
+    - git config --global user.email "user@example.com"
+    - git config --global user.name "User"
+    - ./prepare.sh
+  test_script:
+    - . $HOME/.cargo/env
+    - # Enable backtraces for easier debugging
+    - export RUST_BACKTRACE=1
+    - # Reduce amount of benchmark runs as they are slow
+    - export COMPILE_RUNS=2
+    - export RUN_RUNS=2
+    - ./test.sh
diff --git a/build.sh b/build.sh
index 598ce35ecea..52bc21d0a17 100755
--- a/build.sh
+++ b/build.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 # Settings
@@ -34,13 +34,13 @@ done
 # Build cg_clif
 unset CARGO_TARGET_DIR
 unamestr=$(uname)
-if [[ "$unamestr" == 'Linux' ]]; then
+if [[ "$unamestr" == 'Linux' || "$unamestr" == "FreeBSD" ]]; then
    export RUSTFLAGS='-Clink-arg=-Wl,-rpath=$ORIGIN/../lib '$RUSTFLAGS
 elif [[ "$unamestr" == 'Darwin' ]]; then
    export RUSTFLAGS='-Csplit-debuginfo=unpacked -Clink-arg=-Wl,-rpath,@loader_path/../lib -Zosx-rpath-install-name '$RUSTFLAGS
    dylib_ext='dylib'
 else
-   echo "Unsupported os"
+   echo "Unsupported os $unamestr"
    exit 1
 fi
 if [[ "$CHANNEL" == "release" ]]; then
diff --git a/build_sysroot/build_sysroot.sh b/build_sysroot/build_sysroot.sh
index 282ce4a582c..636aa5f3f3d 100755
--- a/build_sysroot/build_sysroot.sh
+++ b/build_sysroot/build_sysroot.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Requires the CHANNEL env var to be set to `debug` or `release.`
 
diff --git a/build_sysroot/prepare_sysroot_src.sh b/build_sysroot/prepare_sysroot_src.sh
index d3b87e02ba8..d6e012148ac 100755
--- a/build_sysroot/prepare_sysroot_src.sh
+++ b/build_sysroot/prepare_sysroot_src.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 cd "$(dirname "$0")"
 
diff --git a/clean_all.sh b/clean_all.sh
index b47efe72bce..a7bbeb05cac 100755
--- a/clean_all.sh
+++ b/clean_all.sh
@@ -1,4 +1,4 @@
-#!/bin/bash --verbose
+#!/usr/bin/env bash
 set -e
 
 rm -rf target/ build/ build_sysroot/{sysroot_src/,target/,compiler-builtins/} perf.data{,.old}
diff --git a/prepare.sh b/prepare.sh
index 08e7cb18029..ee995ffcfa9 100755
--- a/prepare.sh
+++ b/prepare.sh
@@ -1,4 +1,4 @@
-#!/bin/bash --verbose
+#!/usr/bin/env bash
 set -e
 
 rustup component add rust-src rustc-dev llvm-tools-preview
diff --git a/scripts/cargo.sh b/scripts/cargo.sh
index a3d6d303057..669d2d45b71 100755
--- a/scripts/cargo.sh
+++ b/scripts/cargo.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 dir=$(dirname "$0")
 source "$dir/config.sh"
diff --git a/scripts/config.sh b/scripts/config.sh
index 834708aa9a6..e1f54e4a8b5 100644
--- a/scripts/config.sh
+++ b/scripts/config.sh
@@ -3,7 +3,7 @@
 set -e
 
 unamestr=$(uname)
-if [[ "$unamestr" == 'Linux' ]]; then
+if [[ "$unamestr" == 'Linux' || "$unamestr" == 'FreeBSD' ]]; then
    dylib_ext='so'
 elif [[ "$unamestr" == 'Darwin' ]]; then
    dylib_ext='dylib'
diff --git a/scripts/rustup.sh b/scripts/rustup.sh
index 430f5c469b4..694945a87c2 100755
--- a/scripts/rustup.sh
+++ b/scripts/rustup.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 
diff --git a/scripts/test_bootstrap.sh b/scripts/test_bootstrap.sh
index 15f97c867a1..5bc45488444 100755
--- a/scripts/test_bootstrap.sh
+++ b/scripts/test_bootstrap.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 cd "$(dirname "$0")/../"
diff --git a/scripts/tests.sh b/scripts/tests.sh
index d37b57babe6..cfc0c3fe9bd 100755
--- a/scripts/tests.sh
+++ b/scripts/tests.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 
diff --git a/test.sh b/test.sh
index 5ab10e0e905..e222adc7b80 100755
--- a/test.sh
+++ b/test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 ./build.sh --sysroot none "$@"