diff --git a/packaging/binary-tarball.nix b/packaging/binary-tarball.nix
index 2050384b0..86aae0ac5 100644
--- a/packaging/binary-tarball.nix
+++ b/packaging/binary-tarball.nix
@@ -37,6 +37,9 @@ runCommand "nix-binary-tarball-${version}" env ''
   substitute ${../scripts/install-systemd-multi-user.sh} $TMPDIR/install-systemd-multi-user.sh \
     --subst-var-by nix ${nix} \
     --subst-var-by cacert ${cacert}
+  substitute ${../scripts/install-freebsd-multi-user.sh} $TMPDIR/install-freebsd-multi-user.sh \
+    --subst-var-by nix ${nix} \
+    --subst-var-by cacert ${cacert}
   substitute ${../scripts/install-multi-user.sh} $TMPDIR/install-multi-user \
     --subst-var-by nix ${nix} \
     --subst-var-by cacert ${cacert}
@@ -48,6 +51,7 @@ runCommand "nix-binary-tarball-${version}" env ''
     shellcheck $TMPDIR/create-darwin-volume.sh
     shellcheck $TMPDIR/install-darwin-multi-user.sh
     shellcheck $TMPDIR/install-systemd-multi-user.sh
+    shellcheck $TMPDIR/install-freebsd-multi-user.sh
 
     # SC1091: Don't panic about not being able to source
     #         /etc/profile
@@ -64,6 +68,7 @@ runCommand "nix-binary-tarball-${version}" env ''
   chmod +x $TMPDIR/create-darwin-volume.sh
   chmod +x $TMPDIR/install-darwin-multi-user.sh
   chmod +x $TMPDIR/install-systemd-multi-user.sh
+  chmod +x $TMPDIR/install-freebsd-multi-user.sh
   chmod +x $TMPDIR/install-multi-user
   dir=nix-${version}-${system}
   fn=$out/$dir.tar.xz
@@ -82,6 +87,7 @@ runCommand "nix-binary-tarball-${version}" env ''
     $TMPDIR/create-darwin-volume.sh \
     $TMPDIR/install-darwin-multi-user.sh \
     $TMPDIR/install-systemd-multi-user.sh \
+    $TMPDIR/install-freebsd-multi-user.sh \
     $TMPDIR/install-multi-user \
     $TMPDIR/reginfo \
     $(cat ${installerClosureInfo}/store-paths)
diff --git a/scripts/install-freebsd-multi-user.sh b/scripts/install-freebsd-multi-user.sh
new file mode 100644
index 000000000..0d8b85ec4
--- /dev/null
+++ b/scripts/install-freebsd-multi-user.sh
@@ -0,0 +1,173 @@
+#!/usr/bin/env bash
+
+set -eu
+set -o pipefail
+
+# System specific settings
+# FreeBSD typically uses UIDs from 1001+ for regular users,
+# so we'll use a range that's unlikely to conflict
+export NIX_FIRST_BUILD_UID="${NIX_FIRST_BUILD_UID:-30001}"
+export NIX_BUILD_GROUP_ID="${NIX_BUILD_GROUP_ID:-30000}"
+export NIX_BUILD_USER_NAME_TEMPLATE="nixbld%d"
+
+# FreeBSD service paths
+readonly SERVICE_SRC=/etc/rc.d/nix-daemon
+readonly SERVICE_DEST=/usr/local/etc/rc.d/nix-daemon
+
+poly_cure_artifacts() {
+    :
+}
+
+poly_service_installed_check() {
+    if [ -f "$SERVICE_DEST" ]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+poly_service_uninstall_directions() {
+    cat <<EOF
+$1. Delete the rc.d service
+
+  sudo service nix-daemon stop
+  sudo rm -f $SERVICE_DEST
+  sudo sysrc -x nix_daemon_enable
+
+EOF
+}
+
+poly_service_setup_note() {
+    cat <<EOF
+ - link the nix-daemon rc.d service to $SERVICE_DEST
+
+EOF
+}
+
+poly_extra_try_me_commands() {
+    cat <<EOF
+  $ sudo service nix-daemon start
+EOF
+}
+
+poly_configure_nix_daemon_service() {
+    task "Setting up the nix-daemon rc.d service"
+
+    # Ensure the rc.d directory exists
+    _sudo "to create the rc.d directory" \
+          mkdir -p /usr/local/etc/rc.d
+
+    # Link the pre-installed rc.d script
+    _sudo "to set up the nix-daemon service" \
+          ln -sfn "/nix/var/nix/profiles/default$SERVICE_SRC" "$SERVICE_DEST"
+
+    _sudo "to enable the nix-daemon service" \
+          sysrc nix_daemon_enable=YES
+
+    _sudo "to start the nix-daemon" \
+          service nix-daemon start
+}
+
+poly_group_exists() {
+    pw group show "$1" > /dev/null 2>&1
+}
+
+poly_group_id_get() {
+    pw group show "$1" | cut -d: -f3
+}
+
+poly_create_build_group() {
+    _sudo "Create the Nix build group, $NIX_BUILD_GROUP_NAME" \
+          pw groupadd -n "$NIX_BUILD_GROUP_NAME" -g "$NIX_BUILD_GROUP_ID" >&2
+}
+
+poly_user_exists() {
+    pw user show "$1" > /dev/null 2>&1
+}
+
+poly_user_id_get() {
+    pw user show "$1" | cut -d: -f3
+}
+
+poly_user_hidden_get() {
+    # FreeBSD doesn't have a concept of hidden users like macOS
+    echo "0"
+}
+
+poly_user_hidden_set() {
+    # No-op on FreeBSD
+    true
+}
+
+poly_user_home_get() {
+    pw user show "$1" | cut -d: -f9
+}
+
+poly_user_home_set() {
+    _sudo "in order to give $1 a safe home directory" \
+          pw usermod -n "$1" -d "$2"
+}
+
+poly_user_note_get() {
+    pw user show "$1" | cut -d: -f8
+}
+
+poly_user_note_set() {
+    _sudo "in order to give $1 a useful comment" \
+          pw usermod -n "$1" -c "$2"
+}
+
+poly_user_shell_get() {
+    pw user show "$1" | cut -d: -f10
+}
+
+poly_user_shell_set() {
+    _sudo "in order to prevent $1 from logging in" \
+          pw usermod -n "$1" -s "$2"
+}
+
+poly_user_in_group_check() {
+    groups "$1" 2>/dev/null | grep -q "\<$2\>"
+}
+
+poly_user_in_group_set() {
+    _sudo "Add $1 to the $2 group" \
+          pw groupmod -n "$2" -m "$1"
+}
+
+poly_user_primary_group_get() {
+    pw user show "$1" | cut -d: -f4
+}
+
+poly_user_primary_group_set() {
+    _sudo "to let the nix daemon use this user for builds" \
+          pw usermod -n "$1" -g "$2"
+}
+
+poly_create_build_user() {
+    username=$1
+    uid=$2
+    builder_num=$3
+
+    _sudo "Creating the Nix build user, $username" \
+          pw useradd \
+          -n "$username" \
+          -u "$uid" \
+          -g "$NIX_BUILD_GROUP_NAME" \
+          -G "$NIX_BUILD_GROUP_NAME" \
+          -d /var/empty \
+          -s /sbin/nologin \
+          -c "Nix build user $builder_num"
+}
+
+poly_prepare_to_install() {
+    # FreeBSD-specific preparation steps
+    :
+}
+
+poly_configure_default_profile_targets() {
+    # FreeBSD-specific profile locations
+    # FreeBSD uses /usr/local/etc for third-party shell configurations
+    # Include both profile (for login shells) and bashrc (for interactive shells)
+    echo "/usr/local/etc/profile /usr/local/etc/bashrc /usr/local/etc/profile.d/nix.sh /usr/local/etc/zshrc"
+}
diff --git a/scripts/install-multi-user.sh b/scripts/install-multi-user.sh
index e9ddfc014..477eb1fd6 100644
--- a/scripts/install-multi-user.sh
+++ b/scripts/install-multi-user.sh
@@ -33,7 +33,8 @@ readonly NIX_BUILD_GROUP_NAME="nixbld"
 readonly NIX_ROOT="/nix"
 readonly NIX_EXTRA_CONF=${NIX_EXTRA_CONF:-}
 
-readonly PROFILE_TARGETS=("/etc/bashrc" "/etc/profile.d/nix.sh" "/etc/zshrc" "/etc/bash.bashrc" "/etc/zsh/zshrc")
+# PROFILE_TARGETS will be set later after OS-specific scripts are loaded
+PROFILE_TARGETS=()
 readonly PROFILE_BACKUP_SUFFIX=".backup-before-nix"
 readonly PROFILE_NIX_FILE="$NIX_ROOT/var/nix/profiles/default/etc/profile.d/nix-daemon.sh"
 
@@ -99,6 +100,14 @@ is_os_darwin() {
     fi
 }
 
+is_os_freebsd() {
+    if [ "$(uname -s)" = "FreeBSD" ]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
 contact_us() {
     echo "You can open an issue at"
     echo "https://github.com/NixOS/nix/issues/new?labels=installer&template=installer.md"
@@ -498,6 +507,10 @@ You have aborted the installation.
 EOF
         fi
     fi
+
+    if is_os_freebsd; then
+        ok "Detected FreeBSD, will set up rc.d service for nix-daemon"
+    fi
 }
 
 setup_report() {
@@ -834,7 +847,7 @@ install_from_extracted_nix() {
     (
         cd "$EXTRACTED_NIX_PATH"
 
-        if is_os_darwin; then
+        if is_os_darwin || is_os_freebsd; then
             _sudo "to copy the basic Nix files to the new store at $NIX_ROOT/store" \
                   cp -RPp ./store/* "$NIX_ROOT/store/"
         else
@@ -989,11 +1002,22 @@ main() {
         # shellcheck source=./install-systemd-multi-user.sh
         . "$EXTRACTED_NIX_PATH/install-systemd-multi-user.sh" # most of this works on non-systemd distros also
         check_required_system_specific_settings "install-systemd-multi-user.sh"
+    elif is_os_freebsd; then
+        # shellcheck source=./install-freebsd-multi-user.sh
+        . "$EXTRACTED_NIX_PATH/install-freebsd-multi-user.sh"
+        check_required_system_specific_settings "install-freebsd-multi-user.sh"
     else
         failure "Sorry, I don't know what to do on $(uname)"
     fi
 
 
+    # Set profile targets after OS-specific scripts are loaded
+    if command -v poly_configure_default_profile_targets > /dev/null 2>&1; then
+        PROFILE_TARGETS=($(poly_configure_default_profile_targets))
+    else
+        PROFILE_TARGETS=("/etc/bashrc" "/etc/profile.d/nix.sh" "/etc/zshrc" "/etc/bash.bashrc" "/etc/zsh/zshrc")
+    fi
+
     welcome_to_nix
 
     if ! is_root; then
diff --git a/scripts/install-nix-from-tarball.sh b/scripts/install-nix-from-tarball.sh
index 70fd4897a..fd00460ec 100644
--- a/scripts/install-nix-from-tarball.sh
+++ b/scripts/install-nix-from-tarball.sh
@@ -41,7 +41,7 @@ EOF
 fi
 
 # Determine if we could use the multi-user installer or not
-if [ "$OS" = "Linux" ]; then
+if [ "$OS" = "Linux" ] || [ "$OS" = "FreeBSD" ]; then
     echo "Note: a multi-user installation is possible. See https://nix.dev/manual/nix/stable/installation/installing-binary.html#multi-user-installation" >&2
 fi
 
@@ -125,6 +125,13 @@ while [ $# -gt 0 ]; do
 done
 
 if [ "$INSTALL_MODE" = "daemon" ]; then
+    # Check for bash on systems that don't have it by default
+    if [ "$OS" = "FreeBSD" ] && ! command -v bash >/dev/null 2>&1; then
+        printf '\e[1;31mError: bash is required for multi-user installation but was not found.\e[0m\n' >&2
+        printf 'Please install bash first:\n' >&2
+        printf '  pkg install bash\n' >&2
+        exit 1
+    fi
     printf '\e[1;31mSwitching to the Multi-user Installer\e[0m\n'
     exec "$self/install-multi-user" $ACTION
     exit 0