2 files changed, 11 insertions, 11 deletions

diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index 48b00e1a399a..67178b4a8915 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -29,7 +29,7 @@ void printGCWarning()
     if (!gcWarning) return;
     static bool haveWarned = false;
     warnOnce(haveWarned,
-        "you did not specify ‘--add-root’; "
+        "you did not specify '--add-root'; "
         "the result might be removed by the garbage collector");
 }
 
@@ -76,7 +76,7 @@ string getArg(const string & opt,
     Strings::iterator & i, const Strings::iterator & end)
 {
     ++i;
-    if (i == end) throw UsageError(format("‘%1%’ requires an argument") % opt);
+    if (i == end) throw UsageError(format("'%1%' requires an argument") % opt);
     return *i;
 }
 
@@ -194,7 +194,7 @@ struct LegacyArgs : public MixCommonArgs
         mkFlag(0, "show-trace", "show Nix expression stack trace in evaluation errors",
             &settings.showTrace);
 
-        mkFlag(0, "no-gc-warning", "disable warning about not using ‘--add-root’",
+        mkFlag(0, "no-gc-warning", "disable warning about not using '--add-root'",
             &gcWarning, false);
     }
 
@@ -213,7 +213,7 @@ struct LegacyArgs : public MixCommonArgs
         Strings ss(args);
         auto pos = ss.begin();
         if (!parseArg(pos, ss.end()))
-            throw UsageError(format("unexpected argument ‘%1%’") % args.front());
+            throw UsageError(format("unexpected argument '%1%'") % args.front());
         return true;
     }
 };
@@ -257,7 +257,7 @@ void showManPage(const string & name)
 {
     restoreSignals();
     execlp("man", "man", name.c_str(), NULL);
-    throw SysError(format("command ‘man %1%’ failed") % name.c_str());
+    throw SysError(format("command 'man %1%' failed") % name.c_str());
 }
 
 
@@ -281,13 +281,13 @@ int handleExceptions(const string & programName, std::function<void()> fun)
         return e.status;
     } catch (UsageError & e) {
         printError(
-            format(error + "%1%\nTry ‘%2% --help’ for more information.")
+            format(error + "%1%\nTry '%2% --help' for more information.")
             % e.what() % programName);
         return 1;
     } catch (BaseError & e) {
         printError(format(error + "%1%%2%") % (settings.showTrace ? e.prefix() : "") % e.msg());
         if (e.prefix() != "" && !settings.showTrace)
-            printError("(use ‘--show-trace’ to show detailed location information)");
+            printError("(use '--show-trace' to show detailed location information)");
         return e.status;
     } catch (std::bad_alloc & e) {
         printError(error + "out of memory");
@@ -322,7 +322,7 @@ RunPager::RunPager()
         execlp("pager", "pager", NULL);
         execlp("less", "less", NULL);
         execlp("more", "more", NULL);
-        throw SysError(format("executing ‘%1%’") % pager);
+        throw SysError(format("executing '%1%'") % pager);
     });
 
     pid.setKillSignal(SIGINT);
diff --git a/src/libmain/shared.hh b/src/libmain/shared.hh
index 14e436cc8bb2..becf258734e8 100644
--- a/src/libmain/shared.hh
+++ b/src/libmain/shared.hh
@@ -48,7 +48,7 @@ template<class N> N getIntArg(const string & opt,
     Strings::iterator & i, const Strings::iterator & end, bool allowUnit)
 {
     ++i;
-    if (i == end) throw UsageError(format("‘%1%’ requires an argument") % opt);
+    if (i == end) throw UsageError(format("'%1%' requires an argument") % opt);
     string s = *i;
     N multiplier = 1;
     if (allowUnit && !s.empty()) {
@@ -58,13 +58,13 @@ template<class N> N getIntArg(const string & opt,
             else if (u == 'M') multiplier = 1ULL << 20;
             else if (u == 'G') multiplier = 1ULL << 30;
             else if (u == 'T') multiplier = 1ULL << 40;
-            else throw UsageError(format("invalid unit specifier ‘%1%’") % u);
+            else throw UsageError(format("invalid unit specifier '%1%'") % u);
             s.resize(s.size() - 1);
         }
     }
     N n;
     if (!string2Int(s, n))
-        throw UsageError(format("‘%1%’ requires an integer argument") % opt);
+        throw UsageError(format("'%1%' requires an integer argument") % opt);
     return n * multiplier;
 }