diff --git a/.gitignore b/.gitignore
index 3f2f12f..307e9be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,3 +35,4 @@
 /skychart-4.3-4630-src-nopatents.tar.xz
 /skychart-4.3-4639-src-nopatents.tar.xz
 /skychart-4.3-4719-src-nopatents.tar.xz
+/skychart-4.3-4974-src-nopatents.tar.xz
diff --git a/skychart-4.3-fpc-3.2.4.patch b/skychart-4.3-fpc-3.2.4.patch
new file mode 100644
index 0000000..f4b928c
--- /dev/null
+++ b/skychart-4.3-fpc-3.2.4.patch
@@ -0,0 +1,15 @@
+diff -rU4 skychart-4.3-4974-src--orig/skychart/cu_tz.pas skychart-4.3-4974-src--patched/skychart/cu_tz.pas
+--- skychart-4.3-4974-src--orig/skychart/cu_tz.pas	2025-03-03 03:30:14.000000000 +0100
++++ skychart-4.3-4974-src--patched/skychart/cu_tz.pas	2025-08-15 10:32:52.001369952 +0200
+@@ -41,8 +41,11 @@
+   Windows,
+   {$endif}
+   {$ifdef unix}
+   unixutil,
++    {$IF FPC_FULLVERSION > 30202} // FPC 3.2.4 moves TzSeconds from UnixUtil to Unix
++      unix,
++	{$ENDIF}
+   {$endif}
+   Classes, SysUtils, Math;
+ 
+ type
diff --git a/skychart.spec b/skychart.spec
index 0626edb..25ef4a9 100644
--- a/skychart.spec
+++ b/skychart.spec
@@ -1,5 +1,5 @@
-%global svnversion 4719
-%global date 20240205
+%global svnversion 4974
+%global date 20250303
 %global maj_ver 4.3
 
 Name:       skychart
@@ -18,7 +18,7 @@ URL:        http://www.ap-i.net/skychart/
 # Download upstream tarball from
 # https://sourceforge.net/projects/skychart/files/0-beta/
 # in the same directory of the script and run:
-# ./generate-tarball.sh 4.3-4719
+# ./generate-tarball.sh 4.3-4974
 Source0:    %{name}-%{maj_ver}-%{svnversion}-src-nopatents.tar.xz
 Source1:    generate-tarball.sh
 # Base source data
@@ -56,6 +56,8 @@ Patch:      skychart-4.3-satmessage.patch
 # This feature was asked upstream specifically for Fedora
 Patch:      skychart-4.3-noupdatemenu.patch
 
+# Fix build with FPC 3.2.4
+Patch:      skychart-4.3-fpc-3.2.4.patch
 
 ExclusiveArch: %{fpc_arches}
 ExcludeArch: %{ix86}
@@ -63,14 +65,10 @@ ExcludeArch: %{ix86}
 
 BuildRequires: make
 BuildRequires: fpc
-%if 0%{?fedora} >= 39
 BuildRequires:  fpc-src
 BuildRequires:  lazarus-lcl-nogui
 BuildRequires:  lazarus-lcl-qt5
 BuildRequires:  lazarus-tools
-%else
-BuildRequires:  lazarus >= 1.6.2
-%endif
 BuildRequires: desktop-file-utils
 BuildRequires: dos2unix
 BuildRequires: gtk2-devel
@@ -147,14 +145,14 @@ Provides:       catgen = %{version}-%{release}
 Custom catalog builder for Skychart.
 
 %prep
-%setup0 -q -n %{name}-%{maj_ver}-%{svnversion}-src
+%setup -q -n %{name}-%{maj_ver}-%{svnversion}-src
 
 %autopatch -p1
 
 # Fix executable bit set on sources
 find skychart -type f -print0 | xargs -0 chmod -x
 
-# Put additional catalogs files where where required for installation
+# Put additional catalogs files where are required for installation
 
 cp -p %SOURCE2 ./BaseData
 cp -p %SOURCE3 ./BaseData
@@ -230,7 +228,6 @@ appstream-util validate-relax --nonet %{buildroot}%{_datadir}/metainfo/*.metainf
 %{_datadir}/skychart/cat/milkyway
 %{_datadir}/skychart/cat/openngc
 %{_datadir}/skychart/cat/RealSky
-%{_datadir}/skychart/cat/sac
 %{_datadir}/skychart/cat/xhip
 %dir %{_datadir}/skychart/doc
 %{_datadir}/skychart/doc/html_doc
diff --git a/sources b/sources
index 1ce5e58..c87be5e 100644
--- a/sources
+++ b/sources
@@ -11,4 +11,4 @@ SHA512 (catalog_tycho2.tgz) = 722b542f09752353eab621fdd6559a9e28a9558500f550e63e
 SHA512 (catalog_wds.tgz) = 0aa8a17450c499643a23abcfb2397bbf1b0199c39462538439c02d99c031b483f4a10c6f80de436f59cd8804d0079b4b2020cc8e6fd1dacd3823f72dc25d498c
 SHA512 (catalog_vdb.tgz) = d3df026a2b5a1de6c41c7ec4202da48784d12a9a0adc6e6069a1b5f50b3beb6c80a66fd1be26fdf60fbbccbf32d392bffd0c020a867fe5d276231ecceaaa8528
 SHA512 (data_spicesun.tgz) = 6656d6dd089025cb4cbbb1a76e2a5ae219b1be4ee87d8ceb8ce6abff9d59ed813939928baed2bd8eb4a1a48ec374c76527a5e70e53584bc3612aa12002604706
-SHA512 (skychart-4.3-4719-src-nopatents.tar.xz) = 8b08e337a6f5ffb97b3f09c212fa1a26c1761ddd24296fc4a8214e949cba3161034bd29417796c0754b6c4e09d5ef179480d2b63a729935f8e3716111232eec3
+SHA512 (skychart-4.3-4974-src-nopatents.tar.xz) = 89e5c5c4294b5472b7640d094c498c5be1845616a8b9fd40a5e70b7defe268ddd86cf86e2454bb85dd00b3173fc162eceeddfba54c2cb4f9f0f6f83083b4d13b