diff --git a/build/pkgs/giac/checksums.ini b/build/pkgs/giac/checksums.ini
index 71293fdadc7..7631df83059 100644
--- a/build/pkgs/giac/checksums.ini
+++ b/build/pkgs/giac/checksums.ini
@@ -1,5 +1,5 @@
 tarball=giac-VERSION.tar.bz2
-sha1=873f44e8b6a8f43121c30587d99016763c9e047c
-md5=52eda3193e16ab05b4fb2a727c8f3308
-cksum=2879733923
-upstream_url=https://trac.sagemath.org/raw-attachment/ticket/29552/giac-VERSION.tar.bz2
+sha1=6dd8f1593831a9239f962d2bbf5bf3d8af689891
+md5=d0a1fb47e222a8203d5123d30e472e64
+cksum=3488725427
+upstream_url=https://trac.sagemath.org/raw-attachment/ticket/30537/giac-1.6.0.17p0.tar.bz2
diff --git a/build/pkgs/giac/package-version.txt b/build/pkgs/giac/package-version.txt
index d24489e06fe..37f71346815 100644
--- a/build/pkgs/giac/package-version.txt
+++ b/build/pkgs/giac/package-version.txt
@@ -1 +1 @@
-1.5.0.87p0
+1.6.0.17p0
diff --git a/build/pkgs/giac/patches/autotools/giac-1.5.0.87-gsl_lapack.patch b/build/pkgs/giac/patches/autotools/giac-1.5.0.87-gsl_lapack.patch
index 1ecb49fa081..789023ea485 100644
--- a/build/pkgs/giac/patches/autotools/giac-1.5.0.87-gsl_lapack.patch
+++ b/build/pkgs/giac/patches/autotools/giac-1.5.0.87-gsl_lapack.patch
@@ -1,7 +1,7 @@
-diff --git a/configure.in b/configure.in
+diff --git a/configure.ac b/configure.ac
 index 204d17a..434e4c9 100644
---- a/configure.in
-+++ b/configure.in
+--- a/configure.ac
++++ b/configure.ac
 @@ -38,6 +38,7 @@ AC_LANG([C++])
  AC_PROG_LIBTOOL
  AC_PROG_YACC
diff --git a/build/pkgs/giac/spkg-src b/build/pkgs/giac/spkg-src
index ce9ebcb7d91..bbfdfd8d1e5 100755
--- a/build/pkgs/giac/spkg-src
+++ b/build/pkgs/giac/spkg-src
@@ -13,8 +13,8 @@ fi
 # Exit on failure
 set -e
 
-VERSION="1.5.0"
-VERSIONREV="87"
+VERSION="1.6.0"
+VERSIONREV="17"
 PATCHSUFFIX="p0"
 
 # The upstream tarball name is: giac"$SOURCEORIG".tar.gz
@@ -31,6 +31,7 @@ fi
 
 # Build a temporary working dir. (preferably, a subdir of SAGE_DISTFILES)
 TARGET=$(mktemp -d -p"$SAGE_DISTFILES" 2>/dev/null || mktemp -d)
+echo "Working in $TARGET"
 ORIGDIR=`pwd`
 cd "$TARGET"
 
@@ -80,7 +81,7 @@ tar -cjf "$OUTPUTFILEBASENAME".tar.bz2 src
 
 # cleaning extracted dir.
 cd ..
-rm -rf "$TARGET"
+### rm -rf "$TARGET"
 
 # going back to starting dir
 cd "$ORIGDIR"