diff --git a/src/state/shellscripts/env_hook.csh b/src/state/shellscripts/env_hook.csh
index 3b02429c6a5..8a2c6525f95 100644
--- a/src/state/shellscripts/env_hook.csh
+++ b/src/state/shellscripts/env_hook.csh
@@ -1 +1 @@
-alias precmd 'eval `opam env --shell=csh --readonly`'
+alias precmd 'eval `opam env --shell=csh`'
diff --git a/src/state/shellscripts/env_hook.fish b/src/state/shellscripts/env_hook.fish
index 971be3a4ed7..39fd7cd19f4 100644
--- a/src/state/shellscripts/env_hook.fish
+++ b/src/state/shellscripts/env_hook.fish
@@ -1,3 +1,3 @@
 function __opam_env_export_eval --on-event fish_prompt
-    eval (opam env --shell=fish --readonly 2> /dev/null)
+    eval (opam env --shell=fish 2> /dev/null)
 end
diff --git a/src/state/shellscripts/env_hook.sh b/src/state/shellscripts/env_hook.sh
index 278569eaace..881524bdf5b 100644
--- a/src/state/shellscripts/env_hook.sh
+++ b/src/state/shellscripts/env_hook.sh
@@ -1,6 +1,6 @@
 _opam_env_hook() {
  local previous_exit_status=$?;
- eval $(opam env --shell=bash --readonly 2> /dev/null <&- );
+ eval $(opam env --shell=bash 2> /dev/null <&- );
  return $previous_exit_status;
 };
 if ! [[ "$PROMPT_COMMAND" =~ _opam_env_hook ]]; then
diff --git a/src/state/shellscripts/env_hook.zsh b/src/state/shellscripts/env_hook.zsh
index d9e6a9ab8fc..cb5cba20c4e 100644
--- a/src/state/shellscripts/env_hook.zsh
+++ b/src/state/shellscripts/env_hook.zsh
@@ -1,5 +1,5 @@
 _opam_env_hook() {
-    eval $(opam env --shell=zsh --readonly 2> /dev/null <&-);
+    eval $(opam env --shell=zsh 2> /dev/null <&-);
 }
 typeset -ag precmd_functions;
 if [[ -z ${precmd_functions[(r)_opam_env_hook]} ]]; then