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-rw-r--r--src/nix-build/nix-build.cc4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/nix-build/nix-build.cc b/src/nix-build/nix-build.cc
index 049838bb1..da76c2ace 100644
--- a/src/nix-build/nix-build.cc
+++ b/src/nix-build/nix-build.cc
@@ -536,7 +536,9 @@ static void main_nix_build(int argc, char * * argv)
"SHELL=%5%; "
"BASH=%5%; "
"set +e; "
- R"s([ -n "$PS1" -a -z "$NIX_SHELL_PRESERVE_PROMPT" ] && PS1='\n\[\033[1;32m\][nix-shell:\w]\$\[\033[0m\] '; )s"
+ R"s([ -n "$PS1" -a -z "$NIX_SHELL_PRESERVE_PROMPT" ] && )s" +
+ (getuid() == 0 ? R"s(PS1='\n\[\033[1;31m\][nix-shell:\w]\$\[\033[0m\] '; )s"
+ : R"s(PS1='\n\[\033[1;32m\][nix-shell:\w]\$\[\033[0m\] '; )s") +
"if [ \"$(type -t runHook)\" = function ]; then runHook shellHook; fi; "
"unset NIX_ENFORCE_PURITY; "
"shopt -u nullglob; "