diff --git a/bin/env.bash b/bin/env.bash
index d48f4561..ec156ebc 100644
--- a/bin/env.bash
+++ b/bin/env.bash
@@ -1,7 +1,7 @@
 set -euo pipefail
 
 system=$(uname)
-if [[ $system == "Linux" ]]; then
+if [[ $system == "Linux" ]] || [[ $system == "NetBSD" ]]; then
     ext="so"
 elif [[ $system == "Darwin" ]]; then
     ext="dylib"
diff --git a/core/tsc-dyn-get.el b/core/tsc-dyn-get.el
index 35fecc80..e1e44c96 100644
--- a/core/tsc-dyn-get.el
+++ b/core/tsc-dyn-get.el
@@ -72,7 +72,7 @@ this to nil."
   (pcase system-type
     ('windows-nt "dll")
     ('darwin "dylib")
-    ((or 'gnu 'gnu/linux 'gnu/kfreebsd) "so")
+    ((or 'gnu 'gnu/linux 'gnu/kfreebsd 'berkeley-unix) "so")
     ((or 'ms-dos 'cygwin) (error "Unsupported system-type %s" system-type))
     (_ "so")))
 
diff --git a/lisp/tree-sitter-load.el b/lisp/tree-sitter-load.el
index 95114506..11102755 100644
--- a/lisp/tree-sitter-load.el
+++ b/lisp/tree-sitter-load.el
@@ -32,7 +32,7 @@ See `tree-sitter-require'.")
   (pcase system-type
     ;; The CLI tool outputs `.so', but `.dylib' is more sensible on macOS.
     ('darwin (list ".dylib" ".so"))
-    ('gnu/linux (list ".so"))
+    ((or 'gnu 'gnu/linux 'gnu/kfreebsd 'berkeley-unix) "so")
     ('windows-nt (list ".dll"))
     (_ (error "Unsupported system-type %s" system-type)))
   "List of suffixes for shared libraries that define tree-sitter languages.")