diff --git a/c/heappath.h.in b/c/heappath.h.in
new file mode 100644
index 0000000000..54638ddd3a
--- /dev/null
+++ b/c/heappath.h.in
@@ -0,0 +1,12 @@
+#ifdef WIN32
+/* by default, look in executable directory or in parallel boot directory */
+#define defaultsystemheappath "%x;%x\\..\\..\\boot\\%m"
+#define SEARCHPATHSEP ';'
+
+#else /* not WIN32: */
+#define SEARCHPATHSEP ':'
+/* keep in sync with scheme.1 */
+#define defaultsystemheappath "INSTALLPREFIX/lib/csv%v/%m"
+
+#endif
+
diff --git a/c/scheme.c b/c/scheme.c
index fa7bf66edf..e325d173ee 100644
--- a/c/scheme.c
+++ b/c/scheme.c
@@ -403,11 +403,10 @@ static const char *path_last(p) const char *p; {
   return p;
 }
 
+#include "heappath.h"
+
 #define SEARCHPATHMAXSIZE 8192
 #ifdef WIN32
-/* by default, look in executable directory or in parallel boot directory */
-#define defaultsystemheappath "%x;%x\\..\\..\\boot\\%m"
-#define SEARCHPATHSEP ';'
 
 static char *get_defaultheapdirs() {
   char *result;
@@ -419,10 +418,6 @@ static char *get_defaultheapdirs() {
   return result;
 }
 #else /* not WIN32: */
-#define SEARCHPATHSEP ':'
-/* keep in sync with scheme.1 */
-#define defaultsystemheappath "/usr/lib/csv%v/%m:/usr/local/lib/csv%v/%m"
-
 static char *get_defaultheapdirs() {
   static char defaultheapdirs[SEARCHPATHMAXSIZE];
   const char *home;
diff --git a/configure b/configure
index 1493aaab76..19ac91c3f9 100755
--- a/configure
+++ b/configure
@@ -255,3 +255,6 @@ sed -e "s;^m=none\$;m=$m;"\
     -e "s;^TempRoot=.*;TempRoot=$temproot;"\
     -e "s;^GzipManPages=.*$;GzipManPages=$gzipmanpages;"\
     makefiles/Mf-install.in > $w/Mf-install
+
+sed -e "s;INSTALLPREFIX;$installprefix;" c/heappath.h.in > $w/c/heappath.h
+
diff --git a/makefiles/Mf-install.in b/makefiles/Mf-install.in
index 3cfc4dfc83..c9952407ac 100644
--- a/makefiles/Mf-install.in
+++ b/makefiles/Mf-install.in
@@ -130,9 +130,9 @@ libbininstall: ${LibBin}
 
 maninstall: scheme.1 petite.1 ${Man}
 	$I -m 444 scheme.1 ${Man}/${InstallSchemeName}.1
-	if [ ${GzipManPages} = yes ] ; then gzip ${Man}/${InstallSchemeName}.1 ; fi
+	if [ ${GzipManPages} = yes ] ; then gzip -f ${Man}/${InstallSchemeName}.1 ; fi
 	$I -m 444 petite.1 ${Man}/${InstallPetiteName}.1
-	if [ ${GzipManPages} = yes ] ; then gzip ${Man}/${InstallPetiteName}.1 ; fi
+	if [ ${GzipManPages} = yes ] ; then gzip -f ${Man}/${InstallPetiteName}.1 ; fi
 
 liblibinstall: ${LibLib}
 	$I -m 444 ../examples/* ${LibLib}